Method for autonomous parameterization of field device of process automation equipment

FIELD: automation of processes with usage of field devices.

SUBSTANCE: method is realized in control device by means of operation program, which for parameterization in dialog mode is connected to field device via data transfer bus, and which has no access to device description, which describes behavior of field device in autonomous mode. Technical result is achieved because operation program connects to copy of software program of device executed in field device, realizing imitation of field device in dialog mode.

EFFECT: simplification and lower costs of programming.

8 cl, 3 dwg

 

The invention relates to a method offline parameterization field device for automation engineering processes according to the restrictive part of paragraph 1 of the claims.

In automation engineering processes are often used field devices, which are used for measuring and/or impact on the variables of the process. Examples of such field devices are measurement devices level measuring devices, mass flow, pressure gauges, thermometers, etc. that as sensors measure the relevant variables of the process, such as level, mass flow, pressure or temperature, and control the so-called actuators, which, for example, in the form of valves control the flow of fluid in a section of the line, or in the form of pumps control the filling level of the medium in the tank.

The field devices are often connected through the respective communication connection, usually via a field bus, with the control unit (e.g., programmable logic controller (PLC)that controls the process. In this control block are evaluated measurement data from various sensors and control the respective devices.

In most cases, the field bus is connected to the network connections and, which is used to communicate with the control system (Siemens Simatic S7, Fischer-Rosemount Delta V, ABB Symphonic) and if necessary also with administrative systems (e.g., SAR R/3).

The system controller monitors and displays the progress. System management is also possible immediate access for maintenance, parameterization or configuration of the individual field devices. Due to this access you can modify individual adjustment (e.g., parameters) of the field devices or to cause diagnostic function.

Along with the access control system is also possible temporary access, e.g. via the device service, such as a portable personal computer or a portable device for manual operation. Installed in the device maintenance or control systems of the operational programme are also known as maintenance tools.

In the past, each manufacturer field instruments were also developed appropriate maintenance tools for their field devices. This led to the presence in the market many different maintenance tools. Since modern maintenance tools must provide service not only its own field devices, but also field devices from other manufacturers, according to the proper maintenance tool should obtain information about the functions to be maintenance of the field device. Functions of the field device contained in the device description. For this purpose there are special standard languages to describe devices. Examples of these include CAN-EDS Controll Area Network-Electronic Data Shield, HART DDL, HART Device Descriptions Language, FF-DDL (Foundation Fieldbus Device Descriptions Language), Profibus-GSD (Profibus - master data unit), the Profibus EDD (Profibus-Electronic Device Descriptions).

Data transfer between the field devices and control systems shall be in accordance with well-known international standards for field buses, such as, for example, .HART®, Foundation Fieldbus FF, Profibus, CAN, etc.

As mentioned above, by using the appropriate operating programs to change individual parameters of the field devices.

Examples of such parameters are the measuring range limit values, units, etc.

Typically, the field device to be serviced, physically connected to the computing system (device maintenance management system), in which the operating program (control program)that interacts with the device through the data bus. It is also called service in dialog mode (on-line). The settings are read from the field device and directly after the changes are transmitted to the field device and recorded in his memory. This directly addresses the relationship between PA what ametramo. The change of one parameter can lead to change other settings or display of another parameter. For example, if set to "master reset" to "Yes", the field device is erased action "setting the total sum to zero." An appropriate description of the device for working online says: after recording a full reset to read parameter total. This device sets the total sum to zero, and generates the desired value.

Along with service in dialog mode, it is also desirable service in the Autonomous mode, for example, when the service cannot communicate with the field device; for example, when the corresponding field device at the time of service is not connected to the data bus or in the moment performs the important function of the process that cannot be interrupted. This offline parameterization is possible, for example, using the operating program CommunWin® firm Endress + Hauser.

To ensure the offline parameterization of a particular field device need to either expand the existing description of this field device, which additionally describes the behavior of this field device in standalone mode, or create a new description of the device that contains the behavior of this field device offline. For simple field arr the ditch is easily doable. For field devices that have multiple functions and therefore have a variety of options with the appropriate dependencies, this is not possible without significant programming effort. In particular, it is very difficult to describe the assignment of values to variables, and calculations. Often it is also impossible to fully describe the behavior of offline complex field device using a known language to describe devices. Due to the high cost of programming is not currently possible to perform parameterization offline field instruments series PNG firm Endress + Hauser®.

Therefore, the object of the invention is to provide a method offline parameterization field device for automation engineering processes, which does not require much programming effort and which can be implemented simply and economically.

This problem is solved by using the method according to claim 1 of the claims. The essential idea of the invention is that when the offline parameterization operating program is not connected with the program software of the device, which is performed by the microprocessor of the field device, and executed in a separate computing unit a copy of the program software of the device, and thereby it is not necessary in the description of the device that the special is correctly describes the behavior of the field device offline because the operating program considering the field device as being in dialog mode.

In one embodiment of the invention, the operating program and a copy of the program software of the device installed in a single computational unit. Thus, both programs can work together to run, for example, in a portable personal computer, the user does not notice when executing the operating program.

The operating program and a copy of the program software of the device are preferably connected to each other through a virtual COM interface.

The control device preferably has a Windows platform®. This requires just a programmable shell Windows® to program the software of the device.

Below is a detailed description of the invention with reference to shown in the drawings exemplary embodiment, which is shown:

figure 1 - schematic diagram of the system engineering process automation;

figure 2 - diagram of the device service;

figure 3 - field bus with multiple field devices

Shown in figure 1, the automation system includes a programmable logic controller (PLC), via bus D data connected to multiple field devices F1, F2, F3, etc. Field devices can be, is for example, gauges pressure gauges temperature or pressure, etc. of the Field devices F1, F2, F3 are "smart" devices with the respective microprocessors that execute the corresponding program software instrument, which define the functions of the field devices.

The PLC is connected via bus D data with the corresponding field device, so that between the field devices F1, F2, F3 and PLC controller can transfer data.

Data exchange via the bus data transfer is carried out in accordance with relevant international standards such as CAN, Profibus, HART® or FF.

Bus D data connected device In which the operating program (e.g., FieldTool® firm Endress + Hauser).

Bus D data, which is the so-called field bus, through the gateway G is connected with higher corporate network n To the corporate network N is connected to various control systems L1 (SCADA), L2 (display) and L3 (technology). Higher brand N network also includes a network connection with administrative systems, such as, for example, SAP R/3.

Figure 2 depicts a diagram of the device In control. In this case, the control device is a personal computer PC (laptop), which has essentially DV the external communication port COM1 and COM2 and the expansion slot PCMCI, for example, interface card Profibus®. Other conventional components of a personal computer, such as keyboard, screen and so on, for clarity, are not depicted.

Through COM ports, respectively, of the map interface, you can connect the control unit with different data buses. In the shown case, the port COM1 is connected via modem NM HART® bus N HART®.

In the personal computer PC operating program and program GS software instrument, which, for example, work in Windows®. The operating program is connected to the memory S1, which contains descriptions for the various field devices, and memory S2 to store parameter values. It has a virtual interface SOM, which is connected to a virtual interface COM program software of the device. Program GS software instrument is a copy implemented in a field device software. This software is also called "firmware". In order for this software to work in Windows, the program GS software device encased WH Windows.

Figure 3 shows the bus D data, is connected to two field device F1, F2, system PCS process control, service vychislitel is a great device SR and the server S. As model programs in computing devices, PCS, SR and S is the operating program FieldCare® firm Endress + Hauser, which operates in accordance with the standard FDT/DTM FDT Specification can be obtained in the form of the agreement on the program links Profibus No. 2, 162 version 1.2.

In the system PCS process control and service computing device SR are contained as descriptions of instrument drivers, F1, DTM, F2, DTM, and COM-DTM. Instrument driver F1-DTM relates to the field device F1, F2 driver-DTM - field device F2. COM-DTM is responsible for the communication bus D data.

In the server S has a COM-DTM and virtual instrument driver VF-DTM for a particular field device F3.

This means that bus D data are connected in dialog mode two field device F1 and F2, the Field device F3 is not physically connected to the bus D data, it simulates a virtual instrument driver VF-DTM. In addition, the server S via the Internet connected with manufacturer S+N field device F3.

Below is a description of the method according to the invention, for the offline parameterization, for example, the field device F1.

The operator in the operating environment of the user performed in the control device operating program selects the subject to control the field device F1 and the control mode offline parameterization. When choosing AB is nemnogo mode is possible via a corresponding interface COM1, COM2 or map interface is a direct connection with the program GS software instrument, which is available in the microprocessor of the field device F1.

The operating program associated offline via interfaces SAM and SAM with a copy of the program GS software of the device and sees thereby a field device F1 as being in dialog mode. The original GS software instrument is usually performed in the microprocessor of the field device F1. The operator is now able to perform normal parameterization. Changes of parameters taking into account the dependencies are stored in the memory S2, and once again possible communication with the field device F1 via the Fieldbus, they after prompting the operator to download the changed settings, Yes/no) are transmitted to the field device F1 and stored in it.

Because the program GS software of the device also has an interface COM1, the operating program and program GS software of the device can be run in two computational blocks, which are connected to each other through a cable modem.

When the field device F1 is still unfamiliar to the operating program, the operator selects the menu of the manufacturer and the type of the field device F1, so that the description can be downloaded from the memory S1 or ka is este alternative solutions, using a floppy disk. Thus, the method according to the invention is economical, since the software of the device (firmware) is developed and tested in a personal computer regardless of the offline parameterization, and thus the corresponding programs already available.

Program GS software device can operate not only under the Windows shell, and a shell DTM in accordance with the standard FDT/DTM.

Software GS and shell FDT together form a virtual field device DTM, which in the following is denoted by the position of the VF-DTM. This virtual instrument driver VF-DTM, you can simply type in the model program FDT, such as, for example, FieldCare® firm Endress + Hauser. Together with the conventional device DTM, which has no offline feature, you can maintain such appropriate field device is fully Autonomous mode. For the offline parameterization device DTM may be contacted then with the real field device, and with a virtual field device VF-DTM.

Through an appropriate communication interface COM-DTM using a virtual instrument driver VF-DTM quasi simulate field VF device on the bus D data.

Thus, it is possible to completely parameterize in the design of the installation with n the number of real field devices and one or more virtual field devices. You can give also indicate measurement locations in the form of TAG numbers and bus address is not yet connected to the field bus devices. The operating program associated with not yet connected field device simply with the corresponding virtual instrument drivers VF-DTM.

In a special modification of the invention this information (TAG number and bus address) is transmitted directly to the manufacturer of the instrument for pre-configuration of the field devices in the manufacturing process.

In this case, the operator can set the field devices immediately after their delivery on the bus D data.

The essential idea of the invention is that for the offline parameterization of the field device corresponding to the operating program associated with the copy of the program GS software instrument, which is independent from the field device of the computing unit.

1. The way the offline parameterization field device for automation engineering processes performed using the device In control of the operating program In which to parameterize dialog mode associated with the field device via the bus D data and which does not have access to the device description, which describes the behavior of the field device is F1 offline characterized in that the operating program associated with the copy of the program GS software instrument performed in the field device F1, thereby providing a simulation of the field device F1 in a dialog mode.

2. The method according to claim 1, characterized in that copy of the program GS software of the device and the operating program jointly run the device In control.

3. The method according to claim 1, characterized in that copy of the program GS software of the device and the operating program are connected through a virtual COM interface.

4. The method according to claim 1, characterized in that the control device has a Windows platform®.

5. The method according to claim 4, characterized in that copy of the program GS software of the device is surrounded by a shell Windows®.

6. The method according to claim 4, characterized in that copy of the program GS software of the device is surrounded by a shell DTM.

7. The method according to claim 1, characterized in that the device management is a computing unit in the form of a portable personal computer.

8. The method according to claim 1, characterized in that the adjustment parameterization offline passed the manufacturer of the instrument for pre-configuration of field devices.



 

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