DE102020108230A1 - Method for remote control of a field device - Google Patents

Abstract

The invention relates to a method for remote control of a field device (2a-c), whereby a mobile communication terminal (1) receives identification data (6) from the field device (2a-c) to identify a wireless operating interface (17a-c) of the field device (2a-c ) receives wirelessly, based on the identification data (6) a device operating program (8a-c) for operating the field device (2a-c) by means of the identified wireless operating interface (17a-c) is selected from a plurality of device operating programs (8a-c) , the device operating programs (8a-c) being set up for operation by means of a respective different wireless operating interface (17a-c), a framework application program (10) running on the communication terminal (1) triggering a call to the selected device operating program (8a-c), wherein the framework application program (10) and the plurality of device operating programs (8a-c) can each be run separately on the communication terminal (1), u nd wherein the selected device operating program (8a-c) operates the field device (2a-c) via the identified wireless operating interface (17a-c).

Description

The invention relates to a method for remote control of a field device.

Field devices for industrial applications regularly have an electronic unit for operation. This operation can take place both manually, for example by pressing a button, and increasingly electronically, and here in particular by wireless communication. In order to allow the longest possible autonomous operation of the level measuring devices, a wireless communication protocol is preferably used for such wireless communication, which has only a low energy consumption, but therefore regularly only works over comparatively short distances.

As a result, the wireless operation then takes place regularly in such a way that the user brings a mobile communication terminal into the vicinity of the field device and controls or reads the field device using the wireless communication protocol using an application program that runs on the mobile communication terminal.

However, since the functional interface for this wireless communication interface for various field devices is neither unified nor standardized - and certainly not across manufacturers - a separate application program is required for operation for each individual device type. Because of the large number of different types of devices and the risk for the user not to know in advance about all the device types actually used, it is practically necessary for the user to have a large number of device-specific or at least manufacturer-specific application programs on his To hold the terminal.

In addition, even if the correct application program is fundamentally available on the terminal, the determination of this application program regularly requires a series of attempts, since no active indication of the correct application program for a specific field device is given.

Against this background, the object of the invention is to facilitate the wireless operation of a larger number of types of field devices by a mobile communication terminal.

This object is achieved by a method for remote control of a field device with the features of claim 1.

Essential for the invention is the knowledge that regularly and cyclically according to the wireless communication protocol and thus also by field devices that use the wireless communication protocol - data are sent out which can also be received before a connection is established. Using this data, it is possible to identify the field device so that the presence of the suitable application program can be checked automatically and, if available, this suitable application program can also be called up to operate the field device. In this way, the user is spared laborious and time-consuming trying out different application programs.

The proposed method is used to remotely control a field device. According to the proposed method, a mobile communication terminal receives wireless identification data from the field device to identify a wireless operating interface of the field device. This is therefore identification data which are suitable for identifying the wireless operating interface of the field device. This identification concerns not only the protocol of the wireless operating interface, but also the individual commands and queries of the wireless operating interface. In particular, the identification data are set up to determine commands and queries for operating the field device. This can be done, for example, by comparing it with a database. The term “field device” here and below means the entirety of an arrangement which is set up for measuring, transmitting and possibly displaying a physical variable, for example a level, a temperature, a pressure, a density, a density profile or a flow rate . To the extent that, for example, separately designed operating units, radio units and measuring units interact to measure a physical variable, then all of these individual devices are included in the term “field device”. The same applies to the design of the field device as a level measuring device, temperature measuring device, pressure measuring device, density or density profile measuring device or flow measuring device. In a preferred embodiment, the field device is designed as a level measuring device, preferably a radar level measuring device.

In principle, the field device can be supplied with, in particular, electrical energy in any desired manner. It is preferred that the field device has an energy supply connection for the external supply with electrical energy. However, it can also be the case that the field device has a battery for the operational supply with electrical energy. It can be both that the battery is chargeable and that the battery is not chargeable.

According to the proposed method, a device operating program for operating the field device by means of the identified operating interface is selected from a plurality of device operating programs based on the identification data, the device operating programs being set up for operation by means of a different wireless operating interface. In other words, each device operating program serves to operate a respective field device with a respective different wireless operating interface by means of this respective wireless operating interface. The selected device operating program is set up to operate the specific field device from which the identification data was received by means of the identified operating interface. Operating the field device can include controlling the field device and / or querying or receiving information, for example level, temperature, pressure, density or density profile information from the field device.

It may be that only a single type of field device can be operated by means of the identified operator interface. However, it will regularly be possible to operate a large number of field devices by means of the identified operator interface.

It can also be the case that one or more of the device operating programs of the multiplicity of device operating programs are set up for operation by means of more than one respectively different wireless operating interface. It can therefore be the case that a single device operating program can address more than one wireless operating interface that is different in each case. Correspondingly, it can also happen that, in principle, several device operating programs can be selected from the large number of device operating programs, since all of these several device operating programs are suitable for operation by means of the identified operating interface. In such a case, the selection from these multiple device operating programs can in principle be made in any manner.

According to the proposed method, a framework application program running on the communication terminal triggers the call of the selected device operating program. In principle, the framework application program can be any program. In particular, the selected device operating program can be called up directly or indirectly by the framework application program.

Furthermore, according to the proposed method, the framework application program and the large number of device operating programs can each run separately on the communication terminal and the selected device operating program operates the field device via the wireless operating interface. The fact that the framework application program and the multitude of device operating programs can each run separately on the communication terminal means specifically that the framework application program and each device operating program can run on the communication terminal independently and thus also without any of the other programs. It is therefore a matter of individual programs and not of - either statically or dynamically - interlinked program parts of an individual program.

The field device is preferably a level measuring device for industrial use. In particular, the level measuring device can be a level measuring device for level measurement by means of a radar signal and / or an ultrasonic signal. The level measuring device can be set up for level measurement in a liquid tank or in a silo.

In principle, the operation of the field device can include any operating procedures. A preferred embodiment of the proposed method is characterized in that the selected operating program receives measurement data from the field device via the identified wireless operating interface. In principle, these data can also be transmitted by the field device without a corresponding request. However, it is preferred that the selected operating program receives the measurement data in response to a measurement data query transmitted to the field device by the selected operating program.

In principle, the device operating program can be selected using any mechanism. A preferred embodiment of the proposed method is characterized in that the framework application program is executed to select the device operating program. In particular, it can be that the framework application program executes the selection of the device operating program.

A preferred embodiment of the proposed method is characterized in that the mobile communication terminal is set up for communication via a mobile radio network. The mobile communication terminal can therefore be a mobile phone, a smartphone, a tablet computer or a proprietary, manufacturer-specific mobile communication device. It is further preferred that the framework application program and the selected device operating program run on an operating system for mobile devices which is installed on the mobile communication terminal. In particular, the operating system can be Android or iOS.

In addition to the identification data, the selection of the device operating program can also be based on other data, which can be used in particular for a comparison with the identification data. Another preferred embodiment of the proposed method is therefore characterized in that the selection of the device operating program is also based on at least one reference data set stored on the communication terminal. The at least one reference data record is therefore already stored on the communication terminal before the identification data is received.

Instead of just a single reference data record, a large number of reference data records can also be provided. It is therefore preferred that, in order to select the device operating program, the received identification data are compared with a multiplicity of reference data records, with at least one device operating program of the multiplicity of device operating programs being assigned to each reference data record. The correct device operating program can therefore be determined on the basis of the respective reference data record.

In principle, the reference data records can be obtained from any source. In particular, it can be that the framework application program triggers a wireless transmission of the at least one reference data record from at least one reference data server to the communication terminal. Here and in principle, wireless transmission can also be understood to mean transmission via a cellular mobile radio network. It can also be the case that transmitted reference data sets are held by the framework application program on the communication terminal. In other words, the framework application program then manages the reference data records.

It is preferred that the at least one reference data record is transmitted to the communication terminal as an encrypted reference data record. Such encryption then does not affect the transmission path between the mobile communication terminal and the reference data server - although this transmission path itself can also be encrypted - but the reference data record itself. It is preferred here that a private key for decrypting the encrypted reference data record is stored on the mobile communication terminal. The encrypted reference data set is preferably decrypted using the private key. It can also be the case that the private key is transmitted to the mobile communication terminal based on a licensing of the framework application program. In this way it can be prevented that either unauthorized applications or unlicensed instances of the framework application program can decrypt the encrypted reference data set.

In principle, the reference data records can consist of non-executable user data. In such a case, they have no executable program code. However, it can also be the case that at least some of the reference data records are formed from such executable code. According to a preferred embodiment of the proposed method, it is therefore provided that the at least one reference data record has an executable reference data program which is executed on the communication terminal to select the device operating program. The framework application program preferably triggers the call of the reference data program to select the device operating program. In this case, in the narrower sense, the reference data program selects the device operating program, the selection also being made indirectly by the framework application program, since the framework application program in turn triggers the call of the reference data program. This indirectness can also apply analogously to calling up the selected device operating program. It can therefore be that the call of the reference data program triggered by the framework application program triggers the call of the selected device operating program.

The executable reference data program can be written in a script language. Such a script language is understood to mean a computer program which is interpreted for execution by an interpreter computer program. In this case, it is not a question of program code that can be executed by itself. In particular, the executable reference data program can be written in JavaScript.

However, the executable reference data program can also be a compiled program file. In this case, the executable reference data program was generated from a source text by a compiler. Such a compiled program file can, on the one hand, be executable directly on an operating system of the mobile communication terminal. However, it can also be that the compiled program file can run in a runtime environment, which runtime environment in turn is based on the operating system of the mobile communication terminal. In particular, it may be that the executable reference data program was created in accordance with the .NET Framework. Then it may be that the Compiled program file intermediate language code forms the common language runtime for execution on the runtime environment. However, it is also possible that the reference data program was created in accordance with the .NET Framework and thereby forms a compiled program file that can be executed on the operating system of the mobile communication terminal.

Instead of an executable file of the reference data set, the selection of the device operating program can also be defined by a scheme which is formulated in a metalanguage and which specifies a generic algorithm in such a way that it can analyze certain identification data. This allows flexibility in the selection algorithm even without the provision of an executable file. According to a further embodiment of the proposed method, it is therefore provided that the at least one reference data set comprises analysis data in a metalanguage, preferably in XML (Extensible Markup Language), which analysis data define the selection of the device operating program based on the received identification data.

As already stated above, it is possible that the device operating programs are held on the communication terminal. If, on the other hand, it should be necessary to download a device operating program that is not held on the communication terminal to the communication terminal, the question arises as to which addressing the device operating program from a network such as e.g. B. the Internet the device operating program can be downloaded. It is advantageous here to provide this information in the reference data record itself. A preferred embodiment of the proposed method is then characterized in that each reference data record has a respective resource identifier for access to the at least one device operating program on the Internet. This resource identifier can in particular be a URI (Uniform Resource Identifier).

The possibility of dynamic loading of the reference data sets also allows them to be updated and, if necessary, adjusted. Another preferred embodiment of the proposed method is therefore characterized in that the at least one reference data server is checked cyclically for updated reference data records. It can be the case that the check takes place at identical time intervals. However, it can also be the case that the check takes place at time intervals that differ from one another. It is preferred that the framework application program checks the at least one reference data server for updated reference data records. It is also preferred that an updated reference data set is transmitted wirelessly to the communication terminal, specifically preferably by the framework application program.

In principle, the identification data can have any data that allows the wireless operator interface to be identified. According to a preferred embodiment of the proposed method, it is provided that the received identification data have a manufacturer identifier for identifying a manufacturer of the field device and that a manufacturer identifier is assigned to each reference data record. The wireless operating interfaces are regularly subdivided according to manufacturer, so that different devices from the same manufacturer can also use an identical or at least compatible operating interface. That reference data record can then be selected whose manufacturer identifier corresponds to the manufacturer identifier of the received identification data. In particular, it can be that the framework application program compares the manufacturer identifier of the received identification data with the manufacturer identifier of the at least one reference data record.

In principle, the device operating programs can reach the communication terminal in any way. In particular, they can be transferred to the communication terminal and, in particular, also installed at the same time as the framework application program. According to a further preferred embodiment of the proposed method it is provided that the plurality of device operating programs are kept on at least one operating program server and that the selected device operating program is transmitted wirelessly from the at least one operating program server to the communication terminal.

It is preferred here that this transmission is triggered by the framework application program. The transmission can also be triggered indirectly by the framework application program to the extent that the framework application program calls up another program, such as a reference data program, and this initiates the transmission of the device operating program. The selected device operating program is preferably transmitted by the operating system of the mobile communication terminal. Such a dynamic transfer can, on the one hand, reduce the memory requirement for holding the device operating programs and also ensure that current versions of the device operating programs are used. The transmitted device operating program is preferably installed on the communication terminal. In particular, can this is done if the selected device operating program is not already installed on the communication terminal. The installation can be done through the framework application program.

In principle, the information about where and how the selected device operating program can be accessed for the purpose of transmission can be made known to the framework application program in any way, for example by means of fixed coding in the sequence code of the framework application program. A preferred embodiment of the proposed method is characterized in that the selected device operating program is transmitted based on the resource identifier, preferably by the framework application program. This allows a dynamic adaptation of the specification of the resource.

Another preferred embodiment of the proposed method is therefore characterized in that the selected device operating program is provided with a network identifier of the field device for establishing a communication link between the communication terminal and the field device. This network identifier can be, for example, a network address of the field device. It can also be other information with which a communication connection with the field device can be established or with which the establishment of such a communication connection is at least facilitated. In this way, the time until the appropriate device operating program is used can be shortened. The network identifier is preferably stored in a non-volatile memory of the mobile communication terminal.

In principle, any type of wireless data transmission is possible for the wireless reception of the identification data. According to a preferred embodiment of the proposed method, it is provided that the mobile communication terminal receives the identification data via a wireless local area network. Such a wireless short-range network is also referred to as a wireless personal area network (WPAN). The particular advantage of such wireless short-range networks is that they have a low energy consumption compared to other approaches to wireless communication and are therefore particularly suitable for battery-operated devices.

In principle, it is also possible for the identification data to be received wirelessly on the basis of a different wireless communication protocol than that of the wireless operator interface. However, it is preferred that the large number of device operating programs are set up to control the field device via the wireless local area network. It is then the wireless local area network via which the identification data are received. It is further preferred that the wireless local area network is a Bluetooth network. It is then a network in accordance with the Bluetooth standard.

In principle, the network can then be any type of Bluetooth network. According to a further preferred embodiment of the proposed method, the wireless local area network is a low-energy Bluetooth network. It is then a network in accordance with the low-energy Bluetooth standard, which is also referred to as Bluetooth Low Energy - abbreviated as Bluetooth LE or BLE. This standard is designed for close-range communication with particularly low energy consumption. It is further preferred that the identification data are included in an announcement data record sent out by the field device in the broadcast. In particular, it can be an announcement data record sent out in accordance with the low-energy Bluetooth standard. The sending of this announcement data record is also referred to as BLE advertising. The announcement data records are broadcast and can therefore be received without the need for a Bluetooth connection between the transmitter and the receiver.
It is further preferred here that the identification data are included in an announcement data record for recording manufacturer-defined information. The content of an announcement data record for the inclusion of manufacturer-defined information exists, which is why it is particularly suitable for this purpose.

In principle, the framework application program can be any type of program. One possible embodiment of the proposed method is characterized in that the framework application program runs as a web program in a web browser, which web browser runs on the communication terminal. The framework application program is thus a web program.

• 1 schematisch ein Kommunikationsendgerät zur Ausführung des vorschlagsgemäßen Verfahrens sowie Feldgeräte zur Bedienung durch das Kommunikationsendgerät und Server zum Übertragen von Daten auf das Kommunikationsendgerät,
• 2 schematisch die Architektur von Programmen auf dem Kommunikationsendgerät der 1,
• 3 schematisch den Aufbau von Ankündigungsdaten, welche von dem Kommunikationsendgerät der 1 während des vorschlagsgemäßen Verfahrens empfangen werden.

Further advantageous and preferred configurations emerge from the following description with reference to the figures. In the drawing, which shows only one exemplary embodiment,

• 1 schematically, a communication terminal for carrying out the proposed method as well as field devices for operation by the communication terminal and server for transmitting data to the communication terminal,
• 2 schematically the architecture of programs on the communication terminal of the 1 ,
• 3 schematically the structure of announcement data, which from the communication terminal of the 1 received during the proposed procedure.

The user of the 1 shown mobile communication terminal 1 is located in the immediate vicinity of the field devices 2a-c which all come from different manufacturers and accordingly have a different wireless operating interface 17a-c can be operated. The field devices can be designed, for example, as level measuring devices, pressure measuring devices, flow measuring devices, density or density profile measuring devices. These wireless user interfaces 17a-c but are all based equally on the Bluetooth LE standard. Irrespective of this commonality, the wireless operating interfaces 17a-c different in that the supported operating commands each have a different format and each have at least partially different functionalities.

On the mobile communication terminal 1 a framework application program is running 10 as a web program in a web browser 13th and has access to various reference data sets 11a-c . This connection is in the 2 shown. The reference data sets 11a-c each consist of an executable reference data program 12a-c in the scripting language JavaScript and were previously available on the Internet 15th of that in the 3 reference data server shown 14th on the communication terminal 1 downloaded. The communication terminal 1 is over a cellular network 18th , which is also used to transfer the reference data sets 11a-c served with the internet 15th tied together. Any reference data set 11a-c is based on a respective unique manufacturer identifier 16 indexed and consequently specific for the respective manufacturer of the field device 2a-c .

It is specifically intended to do this in the 1 middle field device 2 B through the communication terminal 1 to be served. The field devices 2a-c communicate wirelessly according to the Bluetooth LE standard and thus via a wireless short-range network 3 . The field devices transmit in accordance with the Bluetooth LE standard 2a-c cyclically announcement data, which are also referred to as advertising data, in the broadcast.

The announcement data of the field device to be operated are exemplary 2 B in the 3 shown. In addition to various other components specified by the standard, these announcement data have a header that is not to be described in more detail here 5 as well as various announcement records 4a-c on. Such an announcement record 4a-c is also known as an advertising data element. The specific content of such an announcement record 4a-c is determined on the basis of a value which indicates the data type - also known as advertising data type - of the respective advertisement data record 4a-c describes. If the data type is set to the value 0 × FF, this includes the announcement data record 4a-c manufacturer-defined information. In the example of the 3 this applies to the third announcement data record 4c, which thus has manufacturer-defined information.
The manufacturer-defined information is identification data 6th . This identification data 6th firstly consist of a manufacturer ID 16 , which is also referred to as the company ID and the device type of the sending field device 2 B . Second, there is the identification data 6th further from a serial number 7th of the field device 2 B , from a fieldbus address of the field device 2 B and finally from an icon URL, which refers to a pictogram which is also stored on a server and which is used by the field device 2 B should represent in a graphical user interface.

The announcement data sent out in the broadcast are received from the communication terminal 1 received and the identification data just described 6th extracted.

The framework application program 10 is the same as the manufacturer ID 16 from the identification data 6th with the manufacturer IDs 16 of the reference data sets 11a-c and calls up that reference data record 11b - and with it the reference data program 12b - on, its manufacturer ID 16 with the one from the received identification data 6th matches. This reference data program 12b now analyzes the received identification data 6th and can use these to determine what type of field device 2 B it is specific and how its wireless operating interface 17b, which is also based on Bluetooth LE, is designed. Specifically determined by the framework application program 10 called reference data program 12b the device operating program assigned to it 8b , which is used to operate the field device 2 B by means of the wireless operating interface 17th is set up. The other device operating programs 8a , c are also used to operate field devices from the same manufacturer as the manufacturer of the field device 2 B which, however, each have a different wireless user interface.

In the reference data program 12b Resource identifiers are stored, each of which has an operating software URL and a call-up URL. The operating software URL refers to an on an operating program server 9 Device operating program available for download 8b for operating the respective field device. The special device operating program can use the call-up URL 8b after transmission to the communication terminal 1 be called. After determining the special level measuring device 2 B based on the identification data 6th the appropriate operating software URL and call-up URL can also be determined.

By using the identification data as described above 6th determined reference data program 12b and its special operating software URL for the determined level measuring device 2 B can use the framework application program 10 the device operating program 8b from the operating program server 9 Download, install and use the call-up URL to operate the field device 2 B call.

The device operating program 8b also the previously received network address 21 of the field device 2 B to hand over.

There are also other device operating programs that are only shown here as examples 20a , b, c for other manufacturers, which are on a further operating program server 19th are stored and could also be downloaded if necessary.

List of reference symbols

1

Communication terminal

2a-c

Field device

3rd

Local area network

4a-c

Announcement record

5

Headboard

6th

Identification data

7th

serial number

8a-c

Device operating programs

9

Operating program server

10

Framework application program

11a-c

Reference data set

12a-c

Reference data program

13th

Web browser

14th

Reference data server

15th

Internet

16

Manufacturer ID

17a-c

User interface

18th

Cellular network

19th

Operating program server

20a-c

Device operating program

21

Network address

Claims (16)

Method for remote control of a field device (2a-c), wherein a mobile communication terminal (1) wirelessly receives identification data (6) from the field device (2a-c) to identify a wireless operating interface (17a-c) of the field device (2a-c), wherein, based on the identification data (6), a device operating program (8a-c) for operating the field device (2a-c) by means of the identified wireless operating interface (17a-c) is selected from a plurality of device operating programs (8a-c), the device operating programs (8a-c) are set up for operation by means of a respectively different wireless operating interface (17a-c), a framework application program (10) running on the communication terminal (1) triggering a call to the selected device operating program (8a-c), the framework application program ( 10) and the large number of device operating programs (8a-c) can each be run separately on the communication terminal (1) and the selected device device operating program (8a-c) operates the field device (2a-c) via the identified wireless operating interface (17a-c). Procedure according to Claim 1 , characterized in that the mobile communication terminal (1) is set up for communication via a cellular network (18), preferably that the framework application program (10) and the selected device operating program (8a-c) run on an operating system for mobile devices, which operating system is on the mobile communication terminal (1) is installed. Procedure according to Claim 1 or 2 , characterized in that the selection of the device operating program (8a-c) is also based on at least one reference data record (11a-c) stored on the communication terminal (1), preferably that the received identification data (6 ) are compared with a large number of reference data sets (11-ac), with each reference data set (11a-c) being assigned at least one device operating program (8a-c) of the plurality of device operating programs (8a-c), in particular that the framework application program (10) a wireless transmission of the at least one reference data set (11a-c) from at least one reference data server (14) to the communication terminal (1), further in particular that transmitted reference data sets (11a-c) are held by the framework application program (10) on the communication terminal (1). Procedure according to Claim 3 , characterized in that the at least one reference data record (11a-c) has an executable reference data program (12a-c) which is executed on the communication terminal (1) to select the device operating program (8a-c). Procedure according to Claim 3 , characterized in that the at least one reference data set (11a-c) comprises analysis data in a metalanguage, preferably in XML, which analysis data defines the selection of the device operating program (8a-c) on the basis of the received identification data (6). Method according to one of the Claims 3 until 5 , characterized in that each reference data record (11a-c) has a respective resource identifier for accessing the at least one device operating program (8a-c) on the Internet (15) Method according to one of the Claims 3 until 6th , characterized in that the at least one reference data server (14) is checked cyclically for updated reference data sets (11a-c), preferably that an updated reference data set (11a-c) is transmitted wirelessly to the communication terminal (1). Method according to one of the Claims 3 until 7th , characterized in that the received identification data (6) have a manufacturer identifier (16) for identifying a manufacturer of the field device (2a-c) and that a manufacturer identifier (16) is assigned to each reference data set (11a-c), preferably that reference data set (11a-c) is transmitted wirelessly from the at least one reference data server (14) to the communication terminal (1), the manufacturer identifier (16) of which corresponds to that of the identification data (6). Method according to one of the Claims 1 until 8th , characterized in that the plurality of device operating programs (8a-c) are held on at least one operating program server (9), that the selected device operating program (8a-c) is transmitted wirelessly from the at least one operating program server (9) to the communication terminal (1) , preferably that the transferred device operating program (8a-c) is installed, in particular if the selected device operating program (8a-c) is not already installed on the communication terminal (1). Procedure according to Claim 9 , characterized in that the selected device operating program (8a-c) is transmitted based on the resource identifier. Method according to one of the Claims 1 until 10 , characterized in that the selected device operating program (8a-c) is provided with a network identifier of the field device (2a-c) for establishing a communication link between the communication terminal (1) and the field device (2a-c). Method according to one of the Claim 1 until 11 , characterized in that the communication terminal (1) receives the identification data via a wireless local area network (3), preferably that the plurality of device operating programs (8a-c) are set up to control the field device (2a-c) via the wireless local area network (3) is, in particular, that the wireless local area network (3) is a Bluetooth network. Procedure according to Claim 12 , characterized in that the wireless local area network (3) is a low-energy Bluetooth network, preferably that the identification data (6) from an announcement data set (4a-c) broadcast by the field device (2a-c), in particular according to the low-energy Bluetooth standard. Procedure according to Claim 13 , characterized in that the identification data is comprised of an announcement data record (4a-c) for recording manufacturer-defined information. Method according to one of the Claims 1 until 14th , characterized in that the framework application program (10) runs as a web program in a web browser (13), which web browser (13) runs on the communication terminal (1). Method according to one of the Claims 1 until 15th , characterized in that at least one field device (2a-c), preferably all field devices (2a-c) are designed as a level measuring device.

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