DE102006017243A1 - Transceiver for use in wireless measured value transmitting arrangement, has radio interface provided for wireless communication, and field device interface for exchanging field device signal - Google Patents

Abstract

The transceiver (R) has a radio interface (204) provided for wireless communication, and a field device e.g. measuring device (100) such as level measuring device, interface (201) for exchanging a field device signal. The radio interface and the field device interface are coupled in such a manner that the field device signal is changeable between the radio interface and the field device interface. The field device interface is formed in such a manner that a field/selected-device specific function is provided in two different operating conditions. An independent claim is also included for a method for wireless transmission of a field device signal by a transceiver.

Description

The The present invention relates to metrology. In particular, it concerns the present invention a transceiver for wireless transmission of field device signals, a wireless measurement transmission arrangement and a method for wireless transmission of field device signals.

Field device signals are signals provided by a field device, a sensor or a meter. In a field device signal, results of measurements, ie measured values, are packed or coded. In the field of measurement and control technology, as well as the process-processing systems, where sensors or actuators are connected to a controller or an evaluation device, today increasingly digitally communicating devices are used. Fieldbuses such as HART ^® Bus, Profibus or Fieldbus Foundation are used for the communication between these devices.

The Wiring of the involved devices may be difficult in this case, if e.g. obstacles like river courses or similar to overcome are. Even an existing wiring is difficult to change, once installed. Likewise, a necessary extension cause problems with a measuring arrangement, because permanently installed bus systems usually specify the installation locations of field devices. This applies in particular to cabling using conduits. The Wiring of the evaluation devices and field devices can be complicated geographic structures or far apart lying field devices, measuring instruments, Sensors or actuators consuming and expensive. Furthermore A wiring based on changes is not flexible.

It An object of the present invention is a simple transmission of measured values.

Accordingly, a Transceiver for wireless transmission of field device signals, one wireless measurement transmission arrangement and a method for wireless transmission of field device signals specified.

According to one embodiment The present invention provides a transceiver for wireless transmission a field device signal provided. The transceiver has a wireless interface for wireless communication and a field device interface for connection to a field device or for connection to an evaluation device. The transceiver is included designed, a field device signal, ie a measured value or a control command, between the radio interface and the field device interface wherein the transceiver and in particular the field device interface is formed, in a first operating state a field device specific function at the field device interface provide. The transceiver and in particular the Field device interface is further formed in a second operating state at the field device interface an evaluation device specific Provide function. The operating state in which the transceiver is located is specifiable.

If the transceiver or the transceiver performs a field device specific function the transceiver over the Field device interface with the field device be coupled. In this case, the transceiver functions such as the polling of the field device or stimulating the field device to carry out perform a measurement.

at the execution an evaluation device specific Function can be the transceiver with an evaluation unit be connected or the transceiver can also provide itself a reading at a field device interface.

According to one another exemplary embodiment The present invention provides a wireless measurement transmission arrangement indicated with a first transceiver and a second transceiver. In this wireless data transmission arrangement the first transceiver is in a first operating state and the second transceiver in a second operating state. In this case, the wireless measured value transmission arrangement is established on at the field device interface of the first transceiver recorded field device signal at the field device interface the second transceiver provide.

According to one more another exemplary embodiment The present invention relates to a method for the wireless transmission of Field devices signals indicated by a transceiver. In the process, first from the transceiver a first operating state taken or a second operating state is taken in the first operating state at a field device interface a field device specific Function is provided and wherein in the second operating state at a field device specific Interface an evaluation device specific Function is provided. The field device signal is between a radio interface and the field device interface changed.

The distinction between a first Operating state and a second operating state, it may allow a transceiver that the transceiver can take different roles in a Meßwertübertragungsanordnung without having to use different devices. This means that based on the same hardware platform with only one device type, the wireless transmission of readings can be realized. The operating state which the transceiver assumes can be predefinable. However, the desired operating state can also be detected, for example, by means of a field device connected to the transceiver or a connected evaluation device. For this purpose, the transceiver can have a recognition device, which allows to recognize the type of a connected device. The detection can be done by exchanging a corresponding signal with a coding.

Accordingly can be a transceiver be used flexibly. In most cases, a flow direction for measured values during the measured value transmission be specified. The flow of a measured value or a field device signal may be in the direction from the field device to an evaluation device. An evaluation device may be a device which is designed to control a field device and process received or output measured values.

at In a measurement, the evaluation device can control the field device. Despite the signal flow related to the measured value from the field device to the evaluation device, between the evaluation unit and the field device However, a bidirectional data exchange done, for example the field device to stimulate a measurement and to receive a measured value. About this bidirectional data exchange can also be a means of communication Commands and responses to commands take place.

He follows the communication between the field device and the evaluation device wirelessly, it may be necessary be a field device interface and in particular field device signals in radio signals for the transfer to convert by means of a radio interface. There, based on the Measurement transmission direction sending the measured values from a field device in the direction of an evaluation device, It can be used for wireless transmission be necessary between a field device side Transceiver and an evaluator-side Transceiver to distinguish.

Based on the measured value exchange the field device side transceiver likes the wireless Transmitter and the evaluation device side transceiver wireless Designate receiving device. The field device side transceiver can thereby connected to the field device and for controlling the field device, the transmitting device Field device-specific functions provide. In this case, functions are to be defined under field device-specific functions be understood that control the field device. For example the features that a field device instruct to generate a metric, but also functions that that of the field device record the measured value.

On the receiving side, ie in the evaluation device side transceiver, other, namely auswertegerätspezifische Functions performed become. Among the evaluation device specific Functions can Here, for example, functions are understood that are providing serve a reading.

In In other words, that means that a wireless transmitting device is designed to control sensors and record readings and these measured values or field device signals to the transmission over the Adapt air interface. The wireless receiving device may be configured to receive a radio signal and to unpack a field device signal packed in the radio signal and this again an evaluation device to disposal put.

One field device can also be an actuator that sends a signal from an evaluation unit receiving, wherein, in an actuator, the signal flow in one of the flow direction When the measured value recording opposite direction takes place. consequently In the case of controlling an actuator, the signal flow of a evaluation to the field device or actor take place.

Either in the case of measured value recording as well as the control of an actuator but can be between the field device side Transceiver and the evaluator side Transceiver bi-directional Communication re the exchange of control commands.

For wireless transmission, wireless protocols such as WLAN (Wireless LAN), Bluetooth or Zigbee can be used. The transceiver can be understood as a gateway for converting the field device interface in the radio interface. Whether the transceiver is used on the evaluation device side or whether the transceiver is used on the field device side can be determined by selecting the operating state. Therefore, a different functionality can be provided with the same hardware platform when connected to the field device or when connected to the evaluation device. Alternatively, the transceiver can also be used as a wireless display device the. A wireless display device may be a wireless receiver with a display / control device.

According to another exemplary embodiment of the present invention, a transceiver is specified, wherein the field device signal of the field device interface of the transceiver is a fieldbus signal. The field device signal may be part of the group of field bus comprising a HART ^® signal, a Profibus signal, a Fieldbus Foundation signal, a 4 ... 20 mA signal, an I ² C signal and a switching signal.

I ² C, I2C or IIC (for Integrated Circuit) is a serial bus for computer systems. It can be used to connect low-speed devices to an embedded system or motherboard.

The HART ^® protocol (Highway Adressible remote transmitter) can be described as an open master slave protocol for bus-addressable field devices in particular. It can implement a method of transmitting data using Frequency Shift Keying (FSK), based on the 4 to 20mA process signal, to enable remote configuration and diagnostic checks. A HART ^® interface of the HART ^® protocol can be used as two-wire bus with integrated power supply be (active) formed or four-wire bus with separate power supply (passive). A HART ^® signal that conforms to the HART ^® protocol is a digital signal for transmitting measured values. The digital HART ^® signal is modulated onto a 4 ... 20mA signal. Consequently, the digital signal can be transmitted in parallel to the analogue 4 ... 20mA signal. If such parallel transfer of analog and digital signals instead of only one field device may be connected to a HART ^® bus.

On the other hand, up to 15 digital field devices can be connected to a HART ^® bus in a so-called multi-drop mode. The analog current is essentially set to 4mA. The field devices exchange a digitally coded signal in multi-drop mode. The digital signal is a frequency modulated signal and the frequency modulated signal can occupy the two frequencies 1200 Hz and 2200 Hz.

Both I2C and HART ^® are suitable as protocols for communication with a field device, eg with a level gauge or with a pressure gauge.

Field devices in the sense of this application any kind of measuring devices be, for example, level gauges, pressure gauges, level detection devices or temperature measuring devices, to name just a few examples. To capture while different physical effects are exploited. The measured value acquisition can be performed with the help of radar beams, ultrasound, Vibration, guided Microwave (TDR, Time Domain Reflection) or capacitive effects respectively.

By the variable provision of different field device signal interfaces it allows be, with different evaluation devices or different field devices or display devices. An indicator or a field device can be sent to the field device interface connected to the transceiver become. The fieldbus signals provided at the field device interfaces can, can in the transceiver be converted into radio signals and so over the air, so wirelessly transmitted become.

It can by wireless transmission using an evaluator side and a field device side Transceiver allows be a connection that is wired over a fieldbus, to separate and thus the wired transmission by wireless transmission to replace.

According to one more another exemplary embodiment According to the present invention, the field device interface is an internal interface educated.

For example, in a display device, a function for detecting the display values may be performed in the transceiver. In this case, the determined value to be displayed can be provided via the internal field device interface in the transceiver to a display / control device integrated in the transceiver. It may thus also be possible to display a measured value received via radio at the transceiver via an I ² C interface. The use as a display device may be another adjustable operating state of a transceiver.

According to one more another exemplary embodiment The present invention provides a transceiver in which the radio interface is designed as an antenna. The antenna has a predeterminable antenna characteristic.

By means of a predeterminable antenna characteristic, the transmission behavior of a radio interface can be adapted. A predeterminable antenna characteristic can, for example, by means of a Antenna arrays are made, the antenna characteristic can be controlled electronically. It can thus be blasted, for example, targeted in a particular direction. As a result, the range of a radio signal can be increased. By means of a predeterminable antenna characteristic it can also be made possible to create so-called radio cells, which means that areas in which different radio frequencies are used can be separated from one another. This can be achieved that small cells are created, and thus more bandwidth can be provided on a total area.

Further will according to one more other embodiment the present invention provides a transceiver, wherein the radio interface having a power limiting device.

The Radio interface can be realized by means of a radio module. Due to legal requirements, it may be necessary to transmit power of a radio module. It may also be necessary to reduce the transmit power of a radio interface to overreach and avoid interference between different radio modules can. The power limitation can be specified. By means of a specifiable power limitation, the transmission power of a transceiver set without using different hardware.

According to one more another exemplary embodiment The present invention provides a transceiver, wherein the radio interface is formed, with a predetermined frequency of 900 MHz or 2.4 GHz. By the predetermined frequency can be switched between different frequencies. As a result, the transceiver also flexible to be followed legal requirements are adjusted. Radio transmission technologies, such as WLAN or Bluetooth, for example, use the so-called ISM (industrial, scientific and medical band) Band for the transmission of data. The ISM band can be license free for used in industrial, scientific or medical applications become. The 2.4 GHz band is used worldwide for industrial, scientific or medical applications released.

This ISM band can but also e.g. use cordless phones or baby monitors. It can Although conditions regarding the transmission power to be maintained and the interference of adjacent frequencies However, within the free ISM band, it may cause transmission interference many devices operating in this band come. These disorders can do it in certain circumstances make necessary, transferred To repeat information. Thus it may be in the transmission to delays come.

According to one another exemplary embodiment According to the present invention, the transceiver is by means of a detachable operating device or display device parameterizable.

The Display / Operator may provide a man-machine interface for the transceiver. About the Display / operating device, a user can parameterize the transceiver or display received values. About the display / control device can For example, be switched between the operating states of the transceiver.

According to one more another exemplary embodiment The present invention provides a transceiver wherein the transceiver switchable between a master function and a slave function is.

A Master function can be over the field device interface on at the field device interface connected field device instruct to provide readings. One furnished as a master wireless transmitting device or a field device side transceiver can consequently instruct a connected sensor or a connected field device, begin with a measurement and provide a reading.

takes whereas a transceiver is one Slave function, the transceiver can use the field device interface on to the field device interface connected evaluation unit Taxes. Thus, a transceiver can get the instruction field device query. By taking a slave function, a transceiver to a evaluation simulate a transparent fieldbus. In other words means that, that the transceiver as a receiving device or evaluator-side transceiver to fool an evaluation can, the transceiver be a field device.

A Request of an evaluation device to an evaluator-side Transceiver can in the transceiver trigger a function, the the transceiver to query a remote field device brings. As a result of this query the transceiver supplies the evaluation unit with a Measured value back.

Since it due to the radio transmission, wel If delays occur between the transceiver and the field device, a proprietary field device protocol adapted to this delay can be used between the evaluation device and the transceiver.

According to one more another exemplary embodiment The present invention provides a transceiver, wherein the transceiver a remote interface device comprising a plurality of Field device interfaces having. The remote interface device may be accessed by one of the plurality of Field device interfaces the remote interface device coupled to the transceiver become. At least one of the plurality of field device interfaces of the remote Interface device is formed a field device signal a remote field device provide.

Transceivers that connected to field devices are, can the field device signals over the Provide radio interface. In this case, for example, several field devices with a transceiver, the corresponding number of field device interfaces has, be connected or it can also be several transceivers in the field with an evaluator side Transceiver communicate. The evaluator side Transceiver can the Signals of the field devices to the remote interface device via a single interface hand off. The remote interface device can receive the signals of the several field devices at each one of the plurality of field device interfaces. This allows the signals to be transmitted to a single transceiver of several field devices provide, whereby a few transceivers must be used to several field devices to be able to query.

According to one more another exemplary embodiment The present invention is a transceiver with a modular housing specified, wherein the modular housing, a head housing module and a socket housing module having. The base housing module is formed, a field device interface and the socket housing module is integral with the head housing module coupled.

Because of the coupling between the head housing module and the base housing module can for example, one for several transceivers same function in the head housing module whereas, via the dockable socket housing module various field device interfaces for different applications can be provided. The transceivers can be easily manufactured. In addition, a transceiver can be extended be and as well can be retrofitted with various field device interfaces allows become.

Consequently are the field device interfaces while maintaining a basic functionality interchangeable and it can therefore, if necessary, over a single socket housing module several field device interfaces to be provided. On the other hand, it may also be desirable only a single field device interface for a only field device provide.

The Basic function, namely polling the one or more field device interfaces and converting in a radio protocol, can be used for all transceivers, regardless of the number of interfaces to be used, to be the same.

through a removable and replaceable base housing module but can also a head housing module a bottom plate will be attached, although no interface provides, however, which serves the attachment of the transceiver. The use of a bottom plate as a base housing module may be in use the transceiver as a display device he wishes be.

According to one more another exemplary embodiment The present invention provides a transceiver being that of the base housing module provided interface designed as a connection for a two-wire field device is. A connection for a two-wire field device For example, you can use two terminals to connect a two-wire connection exhibit. A two-wire field device can use this two-wire connection with power be supplied.

The characteristic as a two-wire connection may represent an exemplary physical form of the field device interface. Although signals transmitted via this interface may differ physically from physically designed physical field device interfaces, the contents may correspond to the signals transmitted via the field device interfaces. As a result, an adaptation to the physical conditions of a field device interface can take place in the base housing module, whereas, for example, basic function accommodated in the head housing module can be the same for all the different physical characteristics of the field device interfaces. Relative to a layered model developed for the presentation of protocols, in the socket housing module Be accommodated functions of the physical adaptation layer.

According to one more another exemplary embodiment of the present invention may be that of the base housing module provided interface designed as a connection for a four-wire field device be. A four-wire connection can have four terminals, being a separate transmission of field device signals and power supply signals becomes. For the power supply can two terminals are provided and for the communication, i. for data transmission, can two additional terminals of the four terminals provided be.

Indeed can also be a transceiver for the Connection of a four-wire device at the transceiver have only two terminals, since the four-wire device via a external power or power supply to be supplied with energy can. Compared to the two terminals of a Two-wire system, can The two terminals of the four-wire device in it differ that over the terminals of the four-wire device no power supply he follows.

According to one more another exemplary embodiment The present invention provides a transceiver in which the base housing module an interface for the Connecting a digital switch provides.

A Interface for a switch may comprise, for example, an optocoupler, whereby a galvanic separation of a switching input can be made can. The switching signal can in the transceiver, in particular in one in the socket housing module housed circuit, be converted into a radio signal and then over the Transmit air interface become. At the evaluation unit, especially at the remote interface device, can the state of a connected switch can be queried by the radio signal is received and evaluated.

According to one another exemplary embodiment The present invention is a transceiver with a Socket housing module created, wherein the base housing module is designed, an interface for connecting a 4 ... 20mA equipment provide. A 4 ... 20mA device can be a measuring device which provides an analogue reading. By means of the 4 ... 20mA device connection can also transmit an analogue reading or percentage wirelessly become.

According to one more another exemplary embodiment The present invention is a transceiver with a Socket housing module provided, wherein the base housing module is formed, the Determine the operating state of the transceiver and adjust.

In the base housing module For example, a coding for identifying the base housing module be provided by the transceiver at a coupling with the housing head module can be queried. It can automatically change the style of the socket housing module provided interface are recognized by the transceiver. Thus, can itself the transceiver to the of the base housing module adapted interface and the transceiver can its Set operating status accordingly.

consequently can also by means of the base housing module be determined whether the transceiver is watching as a wireless transmitting device, ie as a field device side transceiver, or as a wireless receiving device, so as evaluation device side Transceiver, used becomes. In addition to the automatic switching, the switching of the Operating state also manually, by an appropriate configuration of the Transceiver, respectively.

According to one more another exemplary embodiment The present invention provides a transceiver the socket housing module is formed, depending determine from the provided interface a type of the transceiver.

The type of the transceiver can be set between a wireless receiving device, a wireless transmitting device or a display device. The transceiver can also detect the number of connected field devices and also the type of connected field devices. So it can be determined if for example, a HART ^® field device, a 4 ... 20 mA field device or a switch is connected to the transceiver. This allows the transceiver to adapt to the particular interfaces provided and the function or type that the transceiver is to adopt.

In accordance with another exemplary embodiment of the present invention, there is provided a transceiver whose modular head housing module has an antenna. Via the antenna, which can be arranged externally or internally on the head housing module, the Radio transmission take place.

According to one another exemplary embodiment According to the present invention, the antenna can be screwed to the head housing module be fastened. This allows the antenna to be easily installed or be uninstalled.

According to one more another exemplary embodiment According to the present invention, the antenna is by means of an M20 × 1.5 or a ½''NPT (National Pipe Thread) fitting on the head housing module screwed.

According to one more another exemplary embodiment The present invention provides a transceiver, wherein the field device interface is designed for connecting a conduit.

at a conduit is a mostly metallic sheath a wire connection. Through a conduit, a bus can be mechanical influences protected become.

According to one more another exemplary embodiment According to the present invention, the transceiver has a power supply on, wherein the power supply is formed, an over the Field device interface connected field device to provide energy.

through a power supply in the transceiver, with a field device, for example a two-wire field device, can be energized, a self-sufficient use of a Transceiver with a field device respectively. Consequently, you can rely on your own energy supply in the field device be waived. The power supply can, for example, via a Photocell in the transceiver or another regenerative Energy source done.

on the other hand can in the transceiver a power supply for conversion and power supply of the field device or Sensors be present. The generated by this energy supply Energy or power can be over transmit the two-wire connection together with useful signals become. In a four-wire system, this energy is via separate Lines, separated from the wanted signals, transmitted.

before Many embodiments of the invention have been described with reference to the transceiver. These embodiments also apply in a corresponding manner to the wireless Measured value transmission arrangement and the method for wireless transmission of field signals.

in the Below are further exemplary embodiments of the present invention Invention relating to the wireless Meßwertübertragungsanordnung and the Method for wireless transmission of field device signals described. These embodiments also apply to the transceiver.

According to one another exemplary embodiment The present invention provides a wireless measurement transmission arrangement further comprising a third transceiver as described above is, is configured, and wherein the measured value arrangement a remote interface device with a plurality of field device interfaces having. Here is the third transceiver in the first operating state and the remote interface device is by means of a first field device interface of Variety of field device interfaces can be coupled to the second transceiver.

A second field device interface the remote interface device is formed, one over the coupled to the second transceiver field device interface of the first transceiver to provide the measured value. A third field device interface of the remote interface device is designed, one at the field device interface of the third Transceiver to provide the measured value.

It Therefore, the measured values can be recorded on locally separated measuring devices on a single remote interface device. Although the Measuring device at the first transceiver as well as connected to the third transceiver are, the measuring devices can be on a remote interface device. It can However, the provision of the measured values again at separate field device interfaces the remote interface device done.

The Communication of the remote interface device with the second transceiver can also via a proprietary Field device interfaces the remote interface device done. Consequently, can the remote interface device at the field device interfaces a standard field device protocol whereas the remote interface device is for communication with the transceiver a proprietary one Field devices interface protocol can use.

in the Below are advantageous embodiments of the present Invention described with reference to the figures.

1 shows a wired Meßwertübertragungsanordnung according to an exemplary embodiment of the present invention.

2 FIG. 10 shows a wireless measurement transmission arrangement according to an exemplary embodiment of the present invention. FIG.

3 shows a wireless Meßwertübertragungsanordnung with an evaluation device according to an exemplary embodiment of the present invention.

4 FIG. 10 shows a wireless measurement transmission arrangement with a display device according to an exemplary embodiment of the present invention.

5 FIG. 12 shows two parallel wireless measurement transmission arrangements according to an exemplary embodiment of the present invention. FIG.

6 FIG. 10 illustrates a wireless multi-party transmit communication transmission arrangement according to an exemplary embodiment of the present invention. FIG.

7 shows a transceiver in a plastic housing according to an exemplary embodiment of the present invention.

8th shows a transceiver with a display / operating device in a plastic housing according to an exemplary embodiment of the present invention.

9 shows a transceiver with bottom plate in a plastic housing according to an exemplary embodiment of the present invention.

10 shows a transceiver in an aluminum housing according to an exemplary embodiment of the present invention.

11 shows a transceiver with a display / operating device in an aluminum housing according to an exemplary embodiment of the present invention.

12 shows a transceiver with bottom plate in an aluminum housing according to an exemplary embodiment of the present invention.

13 shows a socket housing module with a connection for a two-wire field device according to an exemplary embodiment of the present invention.

14 shows a multi-port socket housing module for field devices according to an exemplary embodiment of the present invention.

15 shows an arrangement for parameterizing a transceiver according to an exemplary embodiment of the present invention.

16 FIG. 12 is an overview block diagram of a transceiver according to an exemplary embodiment of the present invention. FIG.

17 FIG. 12 is a block diagram of a transceiver according to an exemplary embodiment of the present invention. FIG.

18 shows a perspective view of an antenna according to an exemplary embodiment of the present invention.

19 shows a side view of a fastener for an antenna according to an exemplary embodiment of the present invention.

20 shows a sectional view of a fastener for an antenna according to an exemplary embodiment of the present invention.

21 shows a message format of a proprietary transmission protocol according to an exemplary embodiment of the present invention.

22 shows a transceiver that is looped into an analog bus connection, according to an exemplary embodiment of the present invention.

The illustrations in the figures are schematic and not to scale. In the following description of the 1 to 21 the same reference numbers are used for the same or corresponding elements.

1 shows a wired Meßwertübertragungsanordnung according to an exemplary embodiment of the present invention. Here is the field device 100 , Measuring device 100 , Sensor 100 or actor 100 over the bus 101 , in particular via the fieldbus 101 , with the evaluation unit 102 or control unit 102 connected. The of the sensor 100 generated measured values are wired to the evaluation unit 102 transmitted. When transmitting between sensor 100 and evaluation unit 102 over the bus 101 a distinction can be made between an analog transmission and a digital transmission. An analog transmission can take place, for example, by means of a 4... 20 mA signal. A digital broadcast or digital communication can take place by means of a field bus protocol, such as HART ^® -Profibus, Fieldbus Foundation.

As in 2 shown, it is possible by means of a transceiver according to the invention, the wired bus 101 disconnect and through a wireless connection 200 to replace. In addition come in 2 two transceivers T and R are used. The two transceivers T and R are based on the same hardware platform, which however is used in different configurations or in different operating states.

On the field device side, ie on the one with the field device 100 connected side, the transceiver is used in the configuration as a wireless transmitter (transmitter). In the following, a field device side transceiver with the name T will be marked.

On the evaluator side Page comes the transceiver in the configuration or in the operating state as a wireless receiving device (receiver) for use. An evaluator-side Transceiver will be marked with the letter R below.

In the 2 is not an evaluation device drawn because 2 represents the simple case of the separation of an analog field device bus. For this, the wireless transmitter T communicates via HART ^® protocol over the connection 201 with the sensor 100 , Using the HART ^® protocol, it is possible to use the HART ^® standard via the compound 201 anlaoger transmit a current value in parallel with the digital information, because a single field device to the HART ^® bus is connected. For the in 2 However, in the case illustrated, it is first assumed that the connection 201 an analogue 4 ... 20mA current value is exchanged with the wireless transmitting device T.

The of the transmitting device T via the analog connection 201 recorded analog measured values are converted into a radio protocol and as radio signals via the radio interface 200 transmitted to the wireless receiving device R. The wireless receiving device R converts the received radio signals back into analog measured values and provides them as a 4 ... 20mA signal on the connection 202 an evaluation device or a programmable logic controller (PLC) for processing available.

With reference to the measured value transport, a signal flow takes place 2 from the sensor 100 , which receives the measured value, via the wireless transmitter T to the wireless receiving device R to the output 202 or to the field device interface 202 instead of. In the field device 100 It may also be an actuator instead of a sensor, in which case the signal flow in the reverse direction, ie of the connection 202 via the wireless receiving device R, the wireless radio link 200 , the wireless transmitter T and the connection 201 to the actor 100 takes place. Thus, operations of the actuator can be controlled.

Despite the direction given by the measured value flow from a sensor 100 to the connection 202 For example, bidirectional communication for exchanging control signals may take place between the wireless transmitter and the wireless receiver R. By means of in 2 the measured value transmission arrangement shown, the wireless transmission of an analogue 4 ... 20mA signal is possible. The wireless transmitter T and the wireless receiver R can be considered in this deployment as a gateway for wireless communication. In this case, the wireless transmission device T converts a field device interface 203 into the radio interface 204 and the wireless receiving device R converts the radio interface 205 into the field device interface 206 around, at the connection 202 connected.

3 shows a wireless Meßwertübertragungsanordnung with an evaluation device according to an exemplary embodiment of the present invention. Also by means of in 3 arrangement shown can be a fieldbus 101 disconnect and through a wireless communication 200 replace. The sensor 100 is via the HART ^® connection 201 connected to the wireless transmitting device T. For those in the 3 illustrated HART ^® compound 201 should now be accepted digital communication.

In the 3 shown transmitting device T has next to the HART ^® interface 201 additionally a purely analog field device interface 300 in the form of a 4 ... 20mA interface and also two digital interfaces 301 for switching signals. These additional field device interfaces can be provided by replacing a connection module or socket housing module of the wireless transmission device T. At the HART ^® interface 201 can be standard HART ^® sensors 100 connect. Via the HART ^® interface communicates digitally with a connected field device. At the analog connection 300 or the analog field device interface 300 4 ... 20mA devices can be connected. The digital inputs 301 are intended for the connection of digital switches, such as limit switches or alarm switches.

The over the interfaces or connections 201 . 300 and 301 received signals, such as measured values are converted by the transmitting device T in a radio protocol and the radio link 200 wirelessly forwarded to the wireless receiving device R. From the receiving device, the signals are passed through a proprietary protocol to the evaluation. Consequently, the sensor can 100 be operated as if it were directly connected to the evaluation or the evaluation device. The evaluation device is a device that is capable of measuring values from a field device 100 to query and display the received measurements again. The communication between the sensor 100 and the evaluation takes place here on a "nested Communicaion", ie the HART ^® protocol telegrams are packed into the wireless protocol.

At the receiving device R is on the connection 302 the data collector S or the evaluation or control unit S connected. The connection between the wireless receiving device R and the data collector S may be via a standard ^HART® protocol 302 respectively. However, it may also be desirable to make adjustments to the HART ^® protocol for communication between S and R, so that between the wireless receiver R and the data collector S a proprietary communication protocol 302 expires. This proprietary communication protocol may be based on the HART ^® protocol and appropriate adjustments, such as adjusting a time behavior or timing behavior, characteristics of the wireless transmission 200 consider.

The data collector S represents a remote interface device S. The remote interface device S can have a plurality of field device interfaces 303 exhibit. The data collector S has, for example, three analogue 4 ... 20mA interfaces 303 and three switch interfaces 303 on. The interfaces 303 are usually switched as outputs, since usually a communication of the measured values of the field device 100 to the data collector S takes place. When controlling an actuator 100 can the field device interfaces 303 However, also be designed as inputs to control signals from the data collector S to the actuator 100 forward.

In the data collector S or the remote interface device S, an association between the field device interfaces 303 and the field device side field device interfaces 201 . 300 and 301 respectively. Thus, any sensors can be 100 at the exits 303 represent and further process their signals accordingly. The data collector S can also have a display / operating device for displaying the measured values.

In addition, via the communication interface 304 an operation of the data collector done. The communication connection 304 can be designed as RS-232 interface or Ethernet interface. By means of the communication network 305 to which the data collector S is connected, a remote control of the data collector S can take place.

Digitally communicating HART ^® sensors, analogue 4 ... 20mA sensors and limit switches can be connected to the wireless transmitter T.

4 shows a wireless Meßwertübertragungsanordnung with a display device. In 4 the taking of a measured value takes place by means of the sensor 100 , The measured value is transmitted via the HART ^® interface 201 transmitted to the wireless transmitting device T and via the radio interface 204 sent. The measured value is received by the wireless display device D and displayed on the display / control device 400 displayed on the wireless display device D is displayed. The wireless transmitter T, the wireless receiver R and the wireless display device D are based on the same hardware platform. By setting an operating state, this hardware platform can act as a wireless transmitting device T, a wireless receiving device R or a wireless indicating device D.

The wireless display device D essentially corresponds to a wireless receiving device R, in which the measured values do not have an external field device interface 302 . 206 or 202 provided externally, but via an internal field device interface, such as an I ² C interface to the display / control device 400 to get redirected. The hardware platform of the wireless transmitting device T, the wireless receiving device R and the wireless display device D has for this purpose the same I ² C sliding contacts on the display / operating device 400 can establish a connection to the internal bus.

Consequently, the use of a display / control device 400 in addition to the use of the wireless display device D in the wireless transmitting device T and the wireless receiving device R possible. The wireless display device D can be used in the field as a display device for displaying measured values or for parameterizing field devices. Since an input option is desired for the parameterization, the display / operating device 400 Buttons as controls on which values can be entered.

5 FIG. 12 shows two parallel wireless measurement transmission arrangements according to an exemplary embodiment of the present invention. FIG. Since the transceivers R, T, D have an adjustable frequency, different transceivers R, T, D can be operated in parallel without interference. So can the radio transmission links 200 and 501 be decoupled from each other by using different frequencies. The frequency can also be switched during operation of the transceiver, whereby a so-called frequency hopping can be achieved. Here, different hopping sequences can be set, which are traversed in a particular order. Since the frequency sequences of the individual devices differ, it can be largely avoided that overlays of the same frequencies occur.

through By alternating the frequencies, it is also possible to error susceptibility the radio transmission to reduce. So can for example, local Condition for extinguishing of a certain frequency. By means of frequencies that are during change the transmission is it possible that through frequency cancellation only a few radio telegrams disturbed become. These disturbed radio telegrams can however, by a repeated transmission safely transmitted become.

Consequently, a simultaneous provision of the analog 4 ... 20mA signal of the meter 505 at the exit 202 while at the display / control device 400 the indication of one over a HART ^® connection 502 recorded signal takes place. The wireless transmission devices T1 and T2 are both in the operating state, which distinguishes them as transmitting devices.

In addition, the wireless transmission devices T1 and T2 provide different field device interfaces. The wireless transmitter T1, for example, provides the analog 4 ... 20mA signal connection 506 available via the analog measured values of the measuring sensor 505 be queried. By contrast, the transmitting device T2, for example, the HART ^® compound 502 available via which the measured values of the HART ^® sensor 500 be queried.

That the display / control device 400 is not limited to the representation of signals which have been provided over a HART ^® connector, showing 22 , This in 22 illustrated transceiver T was in the analog 4 ... 20mA signal connection 2201 of an existing measuring system. In this configuration, the transceiver T behaves passively. In other words, this means that the transceiver T does not have its own power supply for the sensor 2200 having. The split analogue 4 ... 20mA signal bus 2201 is on the sensor side with the passive 4 ... 20mA signal input 2202 connected. The evaluation / supply unit 504 is via the 4 ... 20mA signal bus 2201 with the passive 4 ... 20mA signal output 2203 connected. The loop-through facility 2203 closes the analogue 4 ... 20mA signal bus interrupted by the transceiver T. The loop-through facility 2201 also ensures that the readings are over the analogue 4 ... 20mA signal bus 2201 , from the sensor 2200 to the signal conditioning instrument 504 be sent, be packaged in a radio protocol and via the radio interface 2204 be transmitted to the wireless display device D. Finally, the received data is processed by the display device D and on the display / control device 400 shown.

6 shows a wireless metering arrangement with multiple subscribers. The wireless transmitter T3 connects the two HART ^® sensors 601 and 602 with the wireless receiver R. The HART ^® sensors 601 and 602 are in multidrop mode.

The wireless transmitter T4 wirelessly connects the analog sensor 604 with the receiving device R. The analogue sensor 604 communicates with the wireless transmitter T4 via the analog field device protocol 300 , which is designed as a 4 ... 20mA signal.

The wireless transmitter T5 connects the HART ^® sensor 600 via the HART ^® connection 201 with the wireless transmitter T5.

The wireless transmitter T5 also provides the ability to connect to the analog port 300 to connect a 4 ... 20mA sensor. In addition, to the two switching inputs 301 digital signalers, such as level limit switches or general limit switches are connected.

All via the radio interface 205 Radio signals received by the wireless receiving device R are converted by the wireless receiving device R into a field bus protocol and via the fieldbus connection 302 on the data Collector S bundled forwarded. In the data collector S, an assignment of individual measuring sensors takes place 600 . 601 . 604 and 602 . 300 and 301 to the corresponding output interfaces 303 , The data collector S can provide three analog 4 ... 20mA signals and at the same time three digital switching inputs. It can thus be at the outputs 303 the signals of the sensors 601 . 100 and 600 and the signals at the digital inputs 301 connected sensor can be displayed.

The assignment of the individual remote sensors or field device interfaces 300 . 301 . 600 . 601 . 602 . 604 to the field device interfaces 303 at the data collector S, can be done via the assignment by means of addresses. The wireless transmitter T3 represents the HART ^® bus 603 available, at the same time several sensors 601 and 602 are connected in multidrop_mode for digital communication. Every single one of the sensors 601 . 602 is an exit 303 clearly assignable.

7 shows a transceiver in a plastic housing according to an embodiment of the present invention. The transceiver R, T is designed as a wireless transmitting device T or wireless receiving device R. The operating state in which the transceiver R, T is located, for example, determined by a device-specific parameters.

The 7 shows the case 708 a wireless transmitter T or a wireless receiver R. The housing 708 has the head box module 700 and the socket housing module 701 on. The socket housing module shows the feeders 705 . 706 and 707 , where the feeder 707 is designed as a feeder for the 4 ... 20mA signal connection to a field device interface and the feeder 706 is designed as a supply to the HART ^® connection, while the supply 705 is designed as a supply to the digital terminals or switching inputs. The head housing module 700 has the twist-off lid 702 on, with the inside of the head housing module is accessible.

On the head housing module 700 is also a connection 703 provided for a power supply and also is on the head housing module 700 the radio interface 704 or antenna 704 arranged. The antenna 704 is by means of an M20 × 1.5 709 or alternatively a ½ "NPT connection thread 709 on the head housing module 700 attached. The antenna 704 is by means of the screw connection 709 arranged at right angles to the housing and is by means of the hinge 1800 bendable up to an angle of substantially 90 °, so that the antenna 704 essentially parallel to the housing wall of the head housing module 700 runs.

The housing 708 is modular. The head housing module 700 and the socket housing mode 701 let go to the case 708 so that the socket housing module is detachable from the head housing module. The base housing module 701 provides a physical interface for the head housing module, in particular for one in the head housing module 700 housed circuit, ready. Due to the base housing module 701 used interface or the setting of the circuit in the head housing module 700 , the operating state is determined thereby determining whether the transceiver 708 act as a transmitting device T or as a receiving device R.

to Setting the appropriate operating state, the base housing module be coded such that the circuit in the head housing module the respectively connected base housing module recognizes and thus independently or can automatically set the respective operating state R, T.

8th shows a transceiver with a display / operating device in a plastic housing according to an exemplary embodiment of the present invention. The use of a plastic housing allows the transceiver to be used 708 in an acid-contaminated environment. In other words, the plastic housing protects a circuit housed in the housing from influences that would act on the circuit by an acid-contaminated ambient air.

The construction of the housing essentially corresponds to that in FIG 7 illustrated housing. Unlike the in 7 shown housing has the head housing module 700 a connection housing or one opposite the lid 702 raised lid 800 on to the display / control device 801 take.

9 shows a transceiver with bottom plate in a plastic housing according to an exemplary embodiment of the present invention. The head housing module 700 in turn corresponds to the head housing module for a wireless transmitter T and for a wireless receiver R. The in 9 shown housing is used with the arranged in the housing display / control device 801 the display of radio signals or the field device signals contained in the radio signals. With the bottom plate 900 can the head housing module 700 together with the raised lid 800 and the display / control panel tung 801 be attached to a wall.

The bottom plate 900 does not provide any interfaces because the measured value is internally in the housing 708 is processed and the measured value thus does not have to be passed on to another external device. A control circuit of the transceiver can detect that the housing bottom plate 900 instead of an interface device 701 is mounted as a base housing module and the control circuit can put the transceiver in an operating state for displaying measured values or as a display device.

10 shows a transceiver in an aluminum housing. The head housing module 1000 Made of aluminum has a high mechanical strength.

The base housing module 701 corresponds to the base housing module of the plastic housing and is also made of plastic. The connection housing 701 or the socket housing module 701 can in turn be replaced and the head housing module 1000 provide different physical interfaces.

11 shows a transceiver with a display / operating device in an aluminum housing according to an exemplary embodiment of the present invention. To accommodate the display / control device 801 is also with the aluminum housing 1001 one opposite the lid 702 raised lid 1100 provided, which makes it possible, the display / control device 801 to operate on a transmitting device T and a receiving device R. The antenna 704 is with the screw connection 709 on the head housing module 1001 attached.

12 shows a transceiver with a bottom plate in an aluminum housing. The housing made of aluminum 1001 and the lid made of aluminum 1100 correspond to the case with the lid of the 11 , Since the transceiver D is only intended to display measured values, a base housing module has been dispensed with, and instead the bottom plate 900 on the head housing module 1001 appropriate.

13 shows a socket housing module with a connection for a two-wire field device according to an exemplary embodiment of the present invention. 13 shows a view of the bottom of a base housing module 701 , The base housing module 701 has the breakthroughs 705 . 706 and 707 through, for example, a connection cable can be inserted into the base housing module. The base housing module 701 make the connection 1300 to disposal. The connection 1300 can be configured as active HART ^® input or passive HART ^® input, as active HART ^® output or as active 4 ... 20mA signal output.

The configuration of the connection 1300 can be done via an adjustment of the transceiver, but the configuration can also by means of an identifier or coding on the base housing module 701 be detected by the transceiver T, R, D. Due to the provided interface 1300 An operating state of the transceiver T, R, D can be set.

The connection 1300 has the terminals 1301 and 1302 on. The term clamp 1301 a positive terminal while the clamp 1302 denotes a negative terminal. Determining if the connection 1300 is configured as an input or output, in turn, depends on the operating state in which the transceiver is located.

14 shows a multi-port socket housing module according to an exemplary embodiment of the present invention. In 14 is also the bottom of a socket housing module 701 with the passages 705 . 706 and 707 to see. The base housing module has the connections 1400 . 1401 . 1402 and 1403 on. The connection 1400 is configurable as active analogue 4 ... 20mA input or passive analogue 4 ... 20mA input. The connection 1401 can be configured as an active input with digital communication or as a passive input with digital communication, as an active output with digital communication or as an active 4 ... 20mA output. The data collector S can be connected to the active output with digital communication. A PLC can be connected to the active 4 ... 20mA output. Opposite a sensor connected to the wireless transmitter T, the wireless transmitter T behaves like a master and waits for the response of the sensor configured as a slave.

The wireless receiving device R is compared to the data collector S as Slave set up and responds to requests from the data collector S.

The connections 1400 and 1401 are intrinsically safe, which means that measures have been taken internally to meet requirements that allow sensors located in a hazardous area to be connected and operated at the transceiver T, R, D. For example, the one at the ports 1400 or 1401 occurring maximum short-circuit current limited.

To separate the intrinsically safe area from a non-intrinsically safe area is the partition wall 1404 intended. In the non-intrinsically safe area are the two digital inputs 1402 and 1403 arranged. The analog connection 1400 indicates the positive terminal 1400 ' and the negative terminal 1402 ' on. The connection 1401 indicates the positive terminal 1401 ' and the negative terminal 1401 '' on. The digital input 1402 , indicates the negative terminal 1402 '' and the positive terminal 1402 ' on.

The second digital input 1403 has the negative terminal 1403 '' and the positive terminal 1403 ' on. The terminals 1301 . 1302 . 1400 ' . 1400 '' . 1401 ' . 1401 '' . 1402 ' . 1402 '' . 1403 ' and 1403 '' are designed as spring terminals for a cable diameter of 2.5 mm ² .

Due to the different configuration of a transceiver, in particular by the different operating states, different configurations of the connections can be made 1300 . 1400 . 1401 . 1402 and 1403 differ.

If the transceiver is configured as a wireless transceiver T, then the ports are 1300 . 1400 . 1401 . 1402 and 1403 configured as inputs. HART ^® compatible field sensors can be connected to a HART ^® input. With a HART ^® input, the active mode and the passive mode can be distinguished. The switching of the modes can be done, for example, by configuring a parameter, by setting the firmware or by determining the operating state. In active mode, both an input and an output are connected to the terminals 1300 . 1400 and 1401 the supply voltage for the operation of the connected sensors available. In the case of an active output, the transceiver R, T, D provides at the terminals 1300 . 1400 . 1401 a stream. In passive mode, sensors with their own power supply can be connected.

In other words, this means that in an active HART ^® input a two-wire sensor is connected, as a power supply voltage can be provided over the active input of the sensor. By contrast, the two-wire sensor delivers digital readings to the active input. An active 4 ... 20mA signal input also provides a supply voltage for a sensor and the connected 4 ... 20mA sensor sets a current that corresponds to the measured value. This can be measured by the transceiver T, for example via a measuring resistor.

A passive input, on the other hand, is an input that does not supply a supply voltage to a connected sensor. Consequently, a four-wire device can be connected to a passive HART ^® input, which is supplied from an external power supply. A passive 4 ... 20mA input is used to determine an analog current that corresponds to a measured value. However, the passive 4 ... 20mA input does not provide any supply voltage. This is provided for example by an external voltage source. The sensor uses the external voltage to set a current that can be measured with a measuring resistor in the transceiver T.

One Active output of the transceiver R behaves like an active output a sensor. In this case, an active output of a transceiver R has a Power supply and drives a current according to the Measured value at the active output. The active output works as a power source.

at a passive output provides an external power supply. With the help of the external power supply is a current through pulled the passive output according to the measured value. The passive one Output works as a current sink.

In the operating state in which the transceiver operates as a wireless transmitting device T is a field device interface 1300 . 1400 . 1401 . 1402 . 1403 with a field device 100 . 500 . 505 . 600 . 601 . 602 . 604 connected. For communication with the field device 100 . 500 . 505 . 600 . 601 . 602 . 604 via a HART ^® bus 1300 . 1401 the wireless transmitter device operates as HART ^® master, wherein the wireless transmitting device can work both as the primary master and as a secondary master. A second master on the HART ^® bus may be allowed. The setting as HART ^® -Master also takes place by determining the current operating status.

As a HART ^® master, the wireless transmission device T is formed commands to field devices 100 . 500 . 505 . 600 . 601 . 602 . 604 and thus the field devices 100 . 500 . 505 600 . 601 and 602 query.

Up to three HART ^® sensors can be connected to one terminal 1300 or 1401 be connected. If three sensors are connected, the HART ^® addresses # 1, # 2 and # 3 are used. If only one sensor is connected, this sensor can 100 . 500 . 505 . 600 . 601 602 and 604 use the addresses # 0, # 1, # 2 or # 3. If several HART ^® sensors are connected, then these in parallel with the terminal 1300 or 1401 connected.

The connection 1400 is configured as 4 ... 20mA input. It is for the analog 4 ... 20mA input 1400 also an active mode and a passive mode are allowed. In active mode is at the port 1400 a voltage is applied and the current flowing through a connected sensor is measured.

In passive mode, the wireless transmitter T becomes, for example, a circuit, as in FIG 22 is shown, looped and the current flowing through the wireless transmitter T current is measured to that of a sensor 2200 to get the measured value.

The Switching of the transceiver R, T, D between active Mode and passive mode can also be accessed via a configuration, via a Firmware setting or via the detection of the operating state or on the detection of the base housing module be determined.

The wireless transmitter T also has the digital switch inputs 1402 and 1403 on. Any switches, such as float switches or relays, can be connected to these digital switching inputs. Limit switches with open collector can also be used, whereby the sensor requires its own power supply.

If the transceiver is the evaluation device side, ie operated in a second operating state or as a wireless receiving device R, so the interfaces 1300 and 1401 be configured as HART ^® output. The HART ^® outputs work here 1300 and 1401 as active HART ^® outputs, ie as power sources.

For communication with the at an output 1300 . 1401 connected to digital communication data collector S, the wireless receiving device R operates as a slave. In this case, find the communication between the data collector S and the wireless receiving device according to a proprietary protocol HART ^® -like instead. This means that the wireless receiving device R is formed on the HART interface ^® 302 . 1300 and 1401 Receive commands and process further to provide a measured value. However, these commands may differ from HART ^® commands.

Due to the fact that there may be delays in response behavior due to the radio link, a proprietary protocol can be used between the connection of the wireless receiving device R and the data collector S. This can be a special timing due to delays on the radio link 200 Be taken into account. The protocol running between the wireless receiving device R and the data collector S on the link 302 may differ from the standard ^HART® protocol.

The connections 1300 . 1400 and 1401 can be configured as analogue 4 ... 20mA outputs when using the transceiver in the second operating state. It can therefore be connected directly to an evaluation unit or a programmable logic controller as a stand-alone device. A remote interface device is therefore no longer necessary to provide interfaces. The analog output 1300 . 1400 and 1401 can be connected to any passive analog input of an evaluation device.

Are the terminals 1300 . 1400 and 1401 Set as 4 ... 20mA outputs, they work actively, ie as a power source. The at the power outlet 1300 . 1400 and 1401 a provided as a wireless receiving device R transceiver current is variable in the range 4 ... 20mA. In this case, the wireless receiving device R determines the sensor value that is provided to it by the wireless transmitting device T available. This sensor value has occurred during a query of the sensor 100 through the wireless transmitter T. The sensor value is transmitted by the wireless transmitter T as a percentage in the range 0 ... 100% to the wireless receiving device R. In turn, R converts the received percentage value into a current value so that 0% corresponds to 4mA output current and 100% corresponds to 20mA output current. R represents the reconverted current value at its output 302 and in particular at the output terminals 1300 . 1400 and 1401 to disposal. Here, R behaves like a proxy, ie like a buffer for a measured value.

• • der letzte an dem Ausgang 302 angelegte Stromwert bleibt unverändert erhalten;
• • der an dem Ausgang 302 angelegte Stromwertnimmt einen Wert von 0mA an;
• • der an dem Ausgang 302 angelegte Stromwertnimmt einen Wert von 20,5mA an;
• • der an dem Ausgang 302 angelegte Stromwertnimmt einen Wert von 22mA an;
• • der an dem Ausgang 302 angelegte Stromwertliegt bei einem Wert von 0% (beispielsweise 4mA) oder bei einem Wert von 100% (beispielsweise 20mA).

The behavior of the wireless receiving device R in case of failure is selectable. There are the following options:

• • the last one at the exit 302 applied current value remains unchanged;
• • the one at the exit 302 applied current value assumes a value of 0mA;
• • the one at the exit 302 applied current value assumes a value of 20.5mA;
• • the one at the exit 302 applied current value assumes a value of 22mA;
• • the one at the exit 302 applied current value is at a value of 0% (for example 4mA) or at a value of 100% (for example 20mA).

15 shows an arrangement for parameterizing a transceiver according to an exemplary embodiment of the present invention. For parameterizing the transceiver R, D, T, in 15 through the head housing module 700 is shown, the parameterization 1500 which may be a PC, for example, over the connection 1501 , for example a USB (Universal Serial Bus) connection, with a parameter adjustment device 1502 connected. The parameter adjustment device 1502 can be connected to the sliding contacts of the internal field device interface or the I ² C interface of the transceiver.

The display / operating device can also be parameterized 801 be used. For this purpose, a parameterization for a transceiver can be stored on a memory of the display / control device. The display / control device 801 or parameterization device 801 is coupled to the transceiver. On the parameterization device 801 For example, the operating state or an address of one or more transceivers can be stored.

The parameterization device 801 can then be coupled to a transceiver to be parameterized. The transceiver recognizes one for the corresponding transceiver on the display / control device 801 stored parameters and can take over the relevant parameters for parameterization. In this case, the operating state and in particular the behavior of the transceiver can be adjusted. It can thus be set whether the corresponding transceiver device behaves as a wireless receiving device or as a wireless transmitting device. After the parameterization of the transceiver device has taken place, the corresponding parameterization entry for the corresponding transceiver can be deleted from the display / operating device and the display / operating device 801 can be attached to another transceiver for parameterization.

By This procedure can be avoided that specialized personnel for Configuration of a transceiver must go locally because the parameterization by means of the display / operating device also by untrained Persons performed can be.

16 FIG. 11 is an overview block diagram of a transceiver according to an exemplary embodiment of the present invention. FIG. In 16 is the power supply 1600 with the voltage converter 1602 to see. This voltage transformer 1602 provides a supply voltage for the transceiver T, R, D. With the supply voltage, the digital part 1601 energized.

The digital part 1601 the transceiver is used to evaluate the input or output signals and the definition of the operating state. On the digital part 1601 regulates the conversion circuit 1603 the conversion of field device interface signals to radio signals. Depending on the selected operating state, in the case of a wireless receiving device R, the conversion circuit takes 1603 Radio signals of the radio module 1604 opposite and converts in the conversion circuit 1603 these into signals at the field device interface 1401 can be provided.

If the transceiver is configured as a wireless transceiver T, the conversion circuit takes 1603 Signals coming in at the entrances 1401 . 1400 . 1402 or 1403 supplied by field devices are opposed and converts these received signals into radio signals. The conversion circuit 1603 gives the radio signals to the radio module 1604 continue and the radio module 1604 finally radiates the radio signals through the antenna 1605 from.

The digital inputs 1402 and 1403 are about the optocouplers 1606 and 1607 connected to the conversion device. Through the use of optocouplers 1606 and 1607 there is a galvanic isolation of the outputs. For galvanic isolation also serves the transformer 1608 that the light-emitting diodes 1606 and 1607 the optocoupler is powered.

If the transceiver is configured as a wireless receiver R, a HART ^® signal is at the field device interface 1401 by means of the HART ^® adjustment circuit 1609 provided. the interface 1401 can also be configured as an analog signal output, in which case the signal matching circuit 1610 the conversion takes place in a corresponding analog signal.

17 FIG. 12 shows a block diagram of a transceiver R, T, S according to an exemplary embodiment of the present invention. In the 17 The circuit shown describes the common hardware platform for the wireless receiving device R, the wireless transmitting device T and the wireless display device D.

The circuit has the supply 1600 on. One at the entrance 1700 provided equal current or AC voltage in the range of 20 to 250 V, for example, the breakthrough 703 the transceiver R, T, D is supplied to the rectifier circuit 1701 and is by means of the circuit adjustment circuit 1702 into the internal supply voltages of 5V 1703 , from +3 V 1704 and +20 V 1705 reshaped and provided the circuit. Also via the supply circuit 1600 the power supply for the analog output takes place 1400 , by means of current regulation 1,706 and the power supply for the HART ^® output 1401 , by means of current regulation 1707 ,

The current to be adjusted in the current regulation 1,706 and 1707 is via the microprocessor 1708 and the pulse width modulation circuit 1709 and 1710 and the low pass circuit 1711 or 1712 provided. The HART ^® adjustment device 1609 or the HART ^® -IC 1609 is used for receiving and interpreting HART ^® commands or measured values in HART ^® format, which are transmitted via the connection 1401 to be provided. The HART ^® -IC is responsible for the modulation or demodulation of the digital data. It converts the binary information into the two frequencies 1200 Hz for logical "1" and 2200 Hz for logical "0".

The voltage frequency conversion circuit 1713 determines the at the analog input 1400 from a 4 ... 20mA sensor, for example, and feeds it to the processor 1708 to. The current corresponds to a measured value measured by the 4 ... 20mA sensor. To determine the current, the 4 ... 20mA input is used 1400 flowing current at the measuring resistor 1725 transformed into a tension. This voltage is converted by the U / F converter (voltage-frequency converter) in a frequency proportional to the voltage. The frequency is the microprocessor 1708 at the port 1715 supplied and from the microprocessor 1708 evaluated. This is the microprocessor 1708 the measured value measured by the sensor in the form of the measured frequency. This value can after a corresponding conversion via the radio interface 1605 be transmitted.

The microprocessor 1708 serves to accommodate the HART ^® signals via the five interface lines 1714 and recording analog signals in the form of a frequency across the pin 1715 ,

The determined values can be determined by the processor 1708 be converted into radio signals and on the five signal lines 1716 via the level adjustment circuit 1717 the radio module 1604 to be provided. In the level adjustment 1717 the power limitation is to a maximum value and in the radio module 1604 the selection of the radio frequency takes place. The radio signals finally reach the antenna via the radio module 1605 and are transmitted via the air interface.

The microprocessor 1708 also sets the internal field device interface 1718 available, for example, via the sliding contacts 1719 the values corresponding to the I ² C protocol for a display are provided. In the EPROM 1720 (Eraseable programmable read-only memory), the selected operating state for the transceiver R, T, D are stored. The value for this can be entered manually or determined on the basis of the socket housing module used.

In addition, the transceiver R, T, D has a static memory 1723 and a flash memory 1722 on, both with the microprocessor 1708 are connected. In the flash memory 1722 For example, the firmware of the transceiver R, T, D deposited. Depending on the role of the transceiver in wireless communication, the appropriate firmware may be loaded or executed.

In the block diagram of 17 is also the terminal circuit 1726 shown. The on the terminal circuit 1720 illustrated connections 1400 . 1401 . 1402 . 1403 , the optocouplers 1606 . 1607 , the transmitter 1608 and the push-pull converter 1724 are essentially in the socket housing module 701 accommodated. In contrast, the power supply circuit 1600 and the digital circuit 1721 as well as the microprocessor 1708 and the radio module 1604 in the head box module 700 accommodated.

The digital circuit 1721 includes the pulse width modulators 1709 . 1710 , the low-pass filter 1711 . 1712 , the HART ^® adjustment device 1609 and the voltage-frequency conversion circuit 1713 ,

The terminal circuit 1726 includes the first digital connection 1402 and the second digital input 1403 , The digital input 1402 leads to the optocoupler 1606 and on the microprocessor 1708 , Likewise, the second digital input leads 1403 via the optocoupler 1607 to the microprocessor 1708 , About the transformer 1608 become the light-emitting diodes of the opto-couplers 1606 and 1607 powered.

The clamp also has the HART ^® input 1401 , HART ^® outlet 1401 or the 4 ... 20mA output 1401 on and the analog 4 ... 20mA input 1400 , The function is whether the connection 1401 as HART ^® input, as HART ^® output or used as a 4 ... 20mA signal output, via the microprocessor 1708 established.

The supply circuit 1600 , the radio module 1604 , the microprocessor 1708 and the digital circuit 1721 are present for the transceiver regardless of the operating state as a wireless transmitting device T, as a wireless receiving device R or wireless display device D. The connection circuit 1726 However, by replacing the base housing module 701 and thereby the terminal circuit 1726 change. Whether the inputs or outputs 1400 . 1401 . 1402 or 1403 are configured as inputs or outputs depends on the respective operating state in which the transceiver R, T, D is located from.

18 shows the perspective view of an antenna according to an exemplary embodiment of the present invention. The antenna 704 indicates the joint 1800 on. By means of the joint 1800 can be an angle between the antenna rod 1801 and the antenna attachment 1802 set in a range between 90 ° and 270 °. In 18 is an angle of 180 ° between the antenna mount and the antenna rod 1801 shown. The antenna attachment 1802 has an angle of 90 ° to the axis of the thread 1803 on.

By means of the screw connection 709 can connect between the antenna rod 1801 and the head housing module 700 getting produced. By means of the connection thread 1803 can the antenna rod 1801 and the screw connection 709 on the head housing module 700 be attached. The thread 1803 can be designed as M20 × 1.5 or alternatively as ½ "NPT thread. The electrical connection of the antenna to the radio module 1604 can over the coaxial cable 1804 and the coaxial connector 1805 respectively.

19 shows a side view of a fastener for an antenna according to an exemplary embodiment of the present invention. In the 19 is the screw connection 709 shown. At the coaxial antenna connector 1900 can the antenna rod 1801 and in particular the antenna attachment 1802 be coupled. The axial direction of the coaxial antenna connector 1900 is perpendicular to the axial direction of the screw thread 1803 arranged. The screw connection 709 is made of metal and in it is the coaxial cable 1804 led, whose on 19 referenced right end in the antenna connection 1900 empties. The left end has the coaxial connector 1805 for coupling to the radio module 1605 on.

20 shows a sectional view of a fastener for an antenna according to an exemplary embodiment of the present invention. The 20 shows the internal structure of the connecting element 709 , The coaxial connector 1900 is with the coaxial conductor 1804 inside the fastener 709 coupled. In the first cavity 2000 of the fastener 709 becomes the coaxial line 1804 deflected in accordance with a predetermined bending radius to get out of the hole 2001 to be able to step out. Thus, an antenna attached to the coaxial connector 1900 is mounted, are arranged parallel to the head housing module wall.

21 shows a message format of a proprietary transmission protocol according to an exemplary embodiment of the present invention. This message format comes for example in the 3 shown wireless Meßwertübertragungsanordnung used to between the data collector S and the wireless receiving device T or between the data collector S and the sensor 100 to communicate.

The extended message format, especially the extended data packet 2100 , indicates the protocol extension 2101 and the payload telegram 2102 on. The protocol extension 2101 includes the parameter NP 2108 which is fixed at 1. The length field L_P1 2109 includes the length of the useful telegram 2102 in addition to that in the field 2113 stored value plus the value 5. The field N_P1_I 2110 always has the constant value 1. In the parameter field P1 2111 a parameter value is provided which gives a data collector S or a parameterization device the instruction for passing through the packet. Next includes the protocol extension 2101 the field GOP # 2112 and the field N_ADR 2113 , Finally, the protocol extension includes 2101 the field G_ADR. About the number of existing fields N_ADR 2113 It can be determined for which device a message or a telegram is intended. If a packet is routed via the various evaluation devices, parameterization devices or transceivers, each device that passes the packet looks at the address information N_ADR 2113 and remove the corresponding field until the target is reached. So it can be communicated through several devices.

The protocol extension field 2101 becomes as a header the useful telegram 2102 prefixed. The extension header 2101 is interpreted by the wireless receiving device R and according to the stored parameters is the useful telegram 2102 forwarded.

By means of this protocol extension, the over the connection between a parameterization device and the wireless receiving device R takes place, two cases can be distinguished. First, in the first case with the protocol 2107 an instruction from the wireless receiving device R to the wireless transmitting device T are directed. This includes the message telegram 2107 the extension header 2101 and the useful signal 2102 with the parameter for the wireless receiving device 2104 , The message format 2107 is used in a transmission as in 2 shown used. When the wireless receiving device R the data message 2107 receives, in the wireless receiving device R, the address information from the parameter 2111 evaluated. The address of the wireless transmitter T to be addressed is from the address field G_ADR 2114 accepted. A new data telegram is assembled and the parameter for the wireless transmitter T is received from the wireless receiver R over the radio link 200 transfer. The wireless transmitter T, which coincides with the address in the address field G_ADR, is responsible for answering the telegram.

The telegram 2106 shows a transmission according to a Meßwertübertragungsanordnung, as in 3 shown. If the data collector S the message telegram 2106 receives, the data collector S evaluates the address information from the parameter 2111 out. The address of the wireless receiving device R to be addressed is in the address information field G_ADR 2114 saved. The address information from the address field G_ADR is adopted and a new message telegram is assembled in the data collector S. This data diagram is transmitted to the connected wireless receiving device R. The header information for the data collector 2101 will be removed and the payload 2103 and 2102 are forwarded to the wireless receiving device R. The wireless receiving device R composes a new transmission telegram and transmits this new transmission telegram via the radio interface 200 to the wireless transmitting device T. The wireless transmitting device T recognizes that in the Nutztelegramm 2102 a request to the connected HART ^® sensor is located and the wireless transmitting device T is the useful telegram 2102 and in particular the parameter for the sensor 2105 to the sensor 100 further.

Complementary to point out that "comprising" no other elements or excludes steps and "one" or "one" does not exclude a multitude. Further It should be noted that features or steps with reference to one of the above embodiments described also in combination with other features or steps Other embodiments described above can be used. Reference signs in the claims are not as a limitation to watch.

Claims (26)

Transceiver for wireless transmission of a field device signal, comprising: a radio interface ( 204 . 205 ), for wireless communication; a field device interface ( 201 . 202 . 206 ), for exchanging the field device signal; where the radio interface ( 204 . 205 ) and the field device interface ( 201 . 202 . 206 ) are coupled such that the field device signal between the radio interface ( 204 . 205 ) and the field device interface ( 201 . 202 . 206 ) is convertible; the field device interface ( 201 . 202 . 206 ) is designed such that in a first operating state, a field device specific function is provided; the field device interface ( 201 . 202 . 206 ) is designed such that in a second operating state an evaluation device-specific function can be provided; wherein the operating state for the transceiver (R, T, D) can be predetermined. A transceiver according to claim 1, wherein the field device signal is selected from the group comprising a HART ^® signal, a Profibus signal, a Fieldbus Foundation signal, a 4 ... 20 mA signal, an I ² C signal and a switching signal. Transceiver according to claim 1, wherein the field device interface ( 201 . 202 . 206 ) as an internal interface ( 1719 ) is trained. Transceiver according to one of claims 1 to 3, wherein the radio interface ( 204 . 205 ) an antenna ( 704 ) having a predeterminable antenna characteristic. Transceiver according to one of claims 1 to 4, wherein the radio interface ( 204 . 205 ) has a power limiting device. Transceiver according to one of Claims 1 to 5, the radio interface ( 204 . 205 ) is designed to operate at a predeterminable frequency of 900 MHz or 2.4 GHz. Transceiver according to one of claims 1 to 6, wherein the transceiver (R, T, D) by means of a removable display / control device ( 801 ) is parameterizable. Transceiver according to one of the claims 1 to 7, wherein the transceiver (R, T, D) between a Master function and a slave function is switchable. Transceiver according to one of claims 1 to 8, further comprising: a remote interface device (S) wherein the remote interface device (S) a plurality of field device interfaces ( 302 . 303 ) having; wherein the remote interface device (S) by means of one of the plurality of field device interfaces ( 302 . 303 ) can be coupled to the transceiver (R, T, D); wherein at least one of the plurality of field device interfaces ( 302 . 303 ), a field device signal of a remote field device ( 100 . 500 . 601 . 602 ). A transceiver according to any one of claims 1 to 9, further comprising: a modular housing ( 708 ) with a head housing module ( 700 ) and a socket housing module ( 701 ); the socket housing module ( 701 ) is a field device interface ( 201 . 201 . 202 . 206 . 300 . 301 . 302 ) to provide; the socket housing module ( 701 ) to the head housing module ( 700 ) can be coupled. A transceiver according to claim 10, wherein the data received from the socket housing module ( 701 ) provided field device interface ( 201 . 202 . 206 . 300 . 301 . 302 . 506 ) as connection ( 1300 . 1400 . 1401 ) is designed for a two-wire field device. A transceiver according to claim 10 or 11, wherein the data received from the socket housing module ( 701 provided interface ( 201 . 202 . 206 . 300 . 301 . 302 . 506 ) is designed as a connection for a four-wire field device. A transceiver according to any one of claims 10 to 12, wherein the data received from the socket housing module ( 701 provided interface ( 201 . 202 . 206 . 300 . 301 . 302 . 506 ) as connection ( 1402 . 1403 ) is designed for a switch. A transceiver according to any one of claims 10 to 13, wherein the data received from the socket housing module ( 701 provided interface ( 201 . 202 . 206 . 300 . 301 . 302 . 506 ) as connection ( 1300 . 1400 . 1401 ) is designed for a 4 ... 20mA device. A transceiver according to any one of claims 10 to 14, wherein the socket housing module ( 701 ) is configured to determine the operating state of the transceiver (R, T, D). A transceiver according to any one of claims 10 to 15, wherein the socket housing module ( 701 ) is formed, depending on the provided interface ( 1300 . 1400 . 1401 . 1402 . 1403 ) to determine a type of the transceiver (R, T, D). A transceiver according to any one of claims 10 to 16, wherein the head housing module ( 700 ) an antenna ( 704 ) having. A transceiver according to claim 17, wherein the antenna ( 704 ) to the head housing module ( 700 ) can be screwed. A transceiver according to claim 18, wherein the antenna ( 704 ) by means of a M20 × 1.5 screw connection or a ½''NPT screw connection ( 1803 ) to the head housing module ( 700 ) can be screwed. A transceiver according to any one of claims 1 to 19, wherein the field device interface ( 201 . 202 . 206 . 300 . 301 . 302 . 506 ) is designed for connecting a conduit. Transceiver according to one of claims 1 to 20, further comprising: a power supply for supplying a field device ( 100 . 500 . 505 . 601 . 602 ) with energy. A wireless data transmission arrangement, comprising: a first transceiver (T1, T2, T3) according to any one of claims 1 to 20; a second transceiver (R) according to any one of claims 1 to 20; wherein the first transceiver (T1, T2, T3) is in the first operating state; wherein the second transceiver (R) is in the second operating state; wherein the wireless measured value transmission arrangement is set up, one at the field device interface ( 502 . 506 . 603 ) of the first transceiver field signal received at the field device interface of the second transceiver ( 202 ). A wireless communication device according to claim 22, further comprising: a third transceiver (T4, T5) according to any one of claims 1 to 21; a remote interface device (S) having a multiplicity of field device interfaces ( 302 . 203 ); wherein the third transceiver (T4, T5) is in the first operating state; wherein the remote interface device (S) by means of a first field device interface ( 302 ) can be coupled to the second transceiver (R); wherein a second field device interface ( 303 ) of the remote interface device (S) is formed, one at the field device interface ( 603 ) of the first transceiver (T3); wherein a third field device interface ( 303 ) of the remote interface device (S), one at the field device interface ( 201 ) of the third transceiver (T4, T5). A method for wireless transmission of a field device signal by means of a transceiver, comprising: selecting between a first operational state and a second operational state for the transceiver (R, T, D); Converting the field device signal between a radio interface ( 204 . 205 ) of the transceiver (R, T, D) and a field device interface ( 201 ) of the transceiver (R, T, D); Providing a field device-specific function at the field device interface ( 201 ) when the transceiver (T) is in the first operating state; Providing an evaluation device-specific function at the field device interface ( 202 ) when the transceiver (R, D) is in the second operating state. A wireless transmission method according to claim 24, further comprising: Choose the transceiver (R, T, D) between the first operating state and the second operating state by means of a base housing module. The wireless transmission method of claim 24 or 25, further comprising: selecting a type of the transceiver (R, T, D) from an interface provided by the transceiver (R, T, D) ( 1300 . 1400 . 1401 . 1402 . 1403 ).