JP2005234925A - Field apparatus and abnormality diagnostic system for the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem that it is difficult to transmit an abnormality determination result of a field apparatus which is determined from the other apparatus to a control machine or a portable terminal for a field. <P>SOLUTION: A self-diagnostic result storage part for storing a self-diagnostic result and an other apparatus determination result storage part for storing an abnormality determination result determined from the other apparatus are built in the field apparatus and data stored in these storage parts are transmitted in accordance with a request from an apparatus such as the control machine, the field portable terminal and the other field apparatus for determining the abnormality of the field apparatus concerned. Since the self-diagnostic result and the abnormality determination result determined from the other apparatus can be simultaneously acquired, abnormality can be quickly determined. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a field device and a system thereof that can accurately determine normality or abnormality by storing and transmitting the state of the own device viewed from other devices.

  FIG. 3 shows the configuration of the process control system. In FIG. 3, the control machine 3, the device management tool 4, the on-site portable terminal 6 and the device I / O card 7 are connected to the bus 6. Field devices such as a pressure gauge 91 and a thermometer 92 are connected to the device I / O card 7. In addition, a communication path 8 is connected to the device I / O card 7, and field devices such as a flow meter 93 and a valve controller 94 are connected to the communication path 8.

  In such a configuration, the control machine 3 acquires process data from the field devices 91 to 93 and performs control, and transmits a control signal to the valve controller 94 and the like to operate and monitor the plant. The device management tool 4 manages configuration information and data of the field devices 91 to 94 and the device I / O card 7. Moreover, the portable terminal 6 for a field is connected to the bus | bath 5 as needed, and adjustment and inspection work of a field apparatus are performed using this portable terminal 6 for a field.

  In such a process control system, the field devices 91 to 94 periodically perform self-checks. When an abnormality of the own device is detected, the fact is transmitted to the control machine 3, the device management tool 4, and the on-site portable terminal 6 via the bus 5. Further, the device management tool 4 collects data output from the field devices 91 to 94, checks whether there is an abnormality, and directly notifies the operator that there is an abnormality.

  However, in such a process control system, a device that collects data of other devices such as the device management tool 4 can detect an abnormality in the field devices 91 to 94. However, there is a problem that it is difficult to transfer the abnormality information to the control machine 3 or the portable terminal 6 for the site.

  The device management tool 4 and the portable terminal 6 for site use are tools designed mainly for connection with the field devices 91 to 94, respectively. For this reason, since there is little need to exchange data between them, it is difficult to exchange data using a common communication means. In particular, when the manufacturers of these tools are different, it is very difficult to communicate between them.

  Therefore, the problem to be solved by the present invention is to save the state of the own device viewed from the other device inside the field device and transmit it to the peripheral device, and the field device and its system capable of accurately judging the abnormality Is to provide.

In order to achieve such a problem, the invention according to claim 1 of the present invention is:
A self-diagnosis result storage unit for storing a self-diagnosis result;
Another device determination result storage unit that stores the result of other devices determining their own normality and abnormality sent via the communication path,
When data is written in the own device diagnosis result storage unit and the other device determination result storage unit and a read command is sent via the communication path, the own device diagnosis result storage unit and the other device determination result storage are stored. A control unit that transmits the data stored in the unit to the device that has transmitted the read command;
Is provided. Device management tools can easily obtain normal and abnormal data determined by other devices.

The invention according to claim 2 is the invention according to claim 1,
The field device is configured to determine its own normality / abnormality based on data stored in the own device diagnosis result storage unit and the other device determination result storage unit. Only field devices can determine their own normality / abnormality based on the determination results of other devices.

The invention according to claim 3 is the invention according to claim 2,
When the data stored in the other device determination result storage unit contradict each other, the larger determination result is adopted. A more reliable determination can be made.

The invention according to claim 4
A self-diagnosis result storage unit for storing a self-diagnosis result, a self-device determination result storage unit for storing a self-determination result sent from another device, the self-machine diagnosis result storage unit, and the other device A field device having a control unit that writes data to the determination result storage unit and transmits the data stored in the self-device diagnosis result storage unit and the other device determination result storage unit when a read command is received;
The data output by the field device is monitored, and if an abnormality occurs in this data, it is determined that there is an abnormality and the result is output to the field device and stored in the own device diagnosis result storage unit and the other device determination result storage unit A device management tool for determining an abnormality of the field device based on the data obtained,
A control machine for obtaining a process amount from the field device and controlling the plant;
A communication path directly or indirectly connected to the field device, the device management tool and the control machine;
Is provided. Device management tools can easily obtain normal and abnormal data determined by other devices.

The invention according to claim 5 is the invention according to claim 4,
A personal computer, and a configuration tool for setting the field device;
In this configuration tool, warning information generated when setting the field device is stored in the other device determination result storage unit in the field device to be set. A device management tool or the like can manage how a field device is used.

The invention according to claim 6 is the invention according to claim 4 or claim 5,
At least two field devices are connected to the communication path, and these field devices mutually monitor the outputs of other field devices, and when an abnormality occurs in the output, the field device in which the abnormality has occurred The abnormality determination information is output. Diagnosis can be made between field devices.

The invention according to claim 7 is the invention according to claim 4 or claim 6,
The field device is configured to determine its own normality / abnormality based on data stored in the own device diagnosis result storage unit and the other device determination result storage unit therein. Based on the determination result of the other device, it is possible to determine whether it is normal or abnormal.

The invention according to claim 8 is the invention according to claim 4 or claim 7,
The control unit is configured to determine whether the field device is normal or abnormal based on data stored in the own device diagnosis result storage unit and the other device determination result storage unit inside the field device. . The control unit can determine whether the field device is normal or abnormal.

The invention according to claim 9 is the invention according to claim 4 or claim 8,
A portable terminal for a field is connected to the communication path, and the portable terminal for the field is based on data stored in the own device diagnosis result storage unit and the other device determination result storage unit inside the field device, It is designed to determine whether the equipment is normal or abnormal. Normal / abnormal field devices can be judged with portable terminals for use in the field.

The invention according to claim 10 is the invention according to claim 4 or claim 9, wherein
When the data stored in the other device determination result storage unit contradict each other, the larger determination result is adopted. A more reliable determination can be made.

As is apparent from the above description, the present invention has the following effects.
According to the first, second, and third aspects of the invention, the self-diagnosis result storage unit that stores the self-diagnosis result in the field device, and the determination result of the normality or abnormality of the self sent from another device Is provided, and the data stored in these storage units is transmitted in response to a read command.

  A device that determines whether a field device is normal or abnormal, such as a device management tool, can easily obtain normal and abnormal data determined by other devices. Therefore, there is an effect that it is possible to more accurately determine whether the field device is normal or abnormal.

  In addition, when the results determined by other devices contradict each other, there is also an effect that more reliable determination can be performed by determining normality or abnormality according to the principle of majority vote.

  According to the inventions of claims 4, 5, 6, 7, 8, 9 and 10, the self-diagnosis results and the results of other devices determining their normality and abnormality are stored, and these data are transmitted. Connecting the field device, the device management tool and the control machine via a communication path, the device management tool reads the self-diagnosis result stored in the field device and the determination result of another device, and the field device is normal. An abnormality was judged.

  Device management tools, control machines, on-site portable terminals, and the like have an effect of being able to easily obtain normal and abnormal data determined by other devices. Therefore, there is an effect that it is possible to more accurately determine whether the field device is normal or abnormal.

  Further, by monitoring the output between the field devices, there is also an effect that diagnosis can be performed between the field devices. Further, by performing the determination according to the majority rule, there is an effect that a more reliable determination can be performed.

  Hereinafter, the present invention will be described in detail with reference to the drawings. The process control system has the same configuration as that shown in FIG. In addition, the field device here refers to a device installed at a plant site such as a pressure transmitter, a flow transmitter, a temperature transmitter, a valve controller, and the like.

  FIG. 1 is a block diagram showing an embodiment of a field device according to the present invention. In this embodiment, an example of a pressure transmitter is shown. In FIG. 1, reference numeral 1 denotes a pressure transmitter, which includes a communication interface 11, a microprocessor 12 connected to the communication interface 11, and a memory 13 connected to the microprocessor.

  The communication interface 11 is connected to the communication path 2, and exchanges data with other devices via the communication path 2. The microprocessor 12 receives a pressure signal from a sensor (not shown), and calculates a pressure value from the pressure signal. This pressure value is transmitted to other devices via the communication interface 11 and the communication path 2. In addition, setting values and the like are input via the communication path 2 and the communication interface 11.

  In the memory 13, an own device diagnosis result storage unit 131 and an other device determination result storage unit 132 are arranged. The self-diagnosis result storage unit 131 stores the result of the pressure transmitter 1 performing a self-check. In addition, the other device determination result storage unit 132 stores the abnormality information of the pressure transmitter 1 determined by another device. This abnormality information is acquired via the communication path 2 and the communication interface 11, and is written by the microprocessor 12.

  When a read command is input from another device via the communication path 2, the microprocessor 12 sends the read command to the data stored in the own device diagnosis result storage unit 131 and the other device determination result storage unit 132. Send to the device. The microprocessor 12 has a function as a control unit that writes data to the own device diagnosis result storage unit 131 and the other device determination result storage unit 132 and reads data from these.

  Next, the operation of this embodiment will be described with reference to the flowchart of FIG. It is assumed that the other device is a device management tool. FIG. 2A shows the operation of the device management tool. In (A-1), the device management tool monitors the data of the field device and determines whether there is an abnormality (A-2). If there is an abnormality, the contents of the abnormality are notified to the field device that has an abnormality in (A-3).

  FIG. 2B shows the operation of the field device. In (B-1), it is monitored whether or not abnormal data is sent from the device management tool, and if it is sent, the data is stored in the other device determination result storage unit 132. Further, in (B-3), it is monitored whether a read command is sent from another device, and if it is sent, the data stored in the own device diagnosis result storage unit 131 and the other device determination result storage unit 132 are read. Send to the device that sent the command.

  Devices that transmit a read command include a control machine, a portable terminal for field use, and other field devices. By transmitting the read command, these devices can obtain not only the self-diagnosis result of the field device but also the determination result viewed from other devices. Therefore, it is possible to more accurately determine whether or not the device is abnormal.

  When a personal computer is used as a configuration tool for setting field devices, warning information generated when setting information such as setting information for flow rate calculation is set, and other device determination results for the field device to be set are stored. It can also be stored in the unit 132.

  In this way, the device management tool can know how the field device is used by reading out the warning information. This is because, in order to process these warning information in the field device, a database of a standard defined by JIS or ISO is necessary, which is substantially difficult.

  In addition, the output information of other devices is monitored between a plurality of field devices to determine whether or not the field devices are abnormal, and the determination result is transmitted to the monitored field devices to be transmitted to the other device determination result storage unit. 132 is stored.

  Each field device can determine whether or not it is normal from the information stored in the self-diagnosis result storage unit 131 and the other device determination result storage unit 132. In this way, mutual diagnosis can be performed using only field devices.

  Furthermore, when the determination results stored in the other device determination result storage unit 132 are mutually contradictory, the determination may be made by majority vote.

It is a block diagram which shows one Example of this invention. It is a flowchart which shows operation | movement of one Example of this invention. It is a block diagram of a process control system.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pressure transmitter 11 Communication interface 12 Microprocessor 13 Memory 131 Self-diagnosis result storage part 132 Other machine determination result storage part 3 Control machine 4 Equipment management tool 6 Portable terminal for field use

Claims (10)

A self-diagnosis result storage unit for storing a self-diagnosis result;
Another device determination result storage unit that stores the result of other devices determining their own normality and abnormality sent via the communication path,
When data is written in the own device diagnosis result storage unit and the other device determination result storage unit and a read command is sent via the communication path, the own device diagnosis result storage unit and the other device determination result storage are stored. A control unit that transmits the data stored in the unit to the device that has transmitted the read command;
A field device characterized by comprising:   2. The field according to claim 1, wherein the field device determines its own normality / abnormality based on data stored in the own device diagnosis result storage unit and the other device determination result storage unit. machine.   3. The field device according to claim 2, wherein when the data stored in the other device determination result storage section contradict each other, a larger determination result is adopted. A self-diagnosis result storage unit for storing a self-diagnosis result, a self-device determination result storage unit for storing a self-determination result sent from another device, the self-machine diagnosis result storage unit, and the other device A field device having a control unit that writes data to the determination result storage unit and transmits the data stored in the self-device diagnosis result storage unit and the other device determination result storage unit when a read command is received;
The data output by the field device is monitored, and if an abnormality occurs in this data, it is determined that there is an abnormality and the result is output to the field device and stored in the own device diagnosis result storage unit and the other device determination result storage unit A device management tool for determining an abnormality of the field device based on the data obtained,
A control machine for obtaining a process amount from the field device and controlling the plant;
A communication path directly or indirectly connected to the field device, the device management tool and the control machine;
An abnormality diagnosis system for a field device, comprising: A personal computer, and a configuration tool for setting the field device;
5. The configuration tool according to claim 4, wherein warning information generated when setting the field device is stored in the other device determination result storage unit in the field device to be set. Field equipment abnormality diagnosis system.   At least two field devices are connected to the communication path, and these field devices mutually monitor the outputs of other field devices, and when an abnormality occurs in the output, the field device in which the abnormality has occurred 6. The field device abnormality diagnosis system according to claim 4, wherein abnormality determination information is output.   5. The field device is configured to determine its own normality and abnormality based on data stored in the own device diagnosis result storage unit and the other device determination result storage unit therein. Or the abnormality diagnosis system of the field device in any one of Claim 6.   The control unit determines whether the field device is normal or abnormal based on data stored in the own device diagnosis result storage unit and the other device determination result storage unit inside the field device. An abnormality diagnosis system for a field device according to any one of claims 4 and 7.   A portable terminal for a field is connected to the communication path, and the portable terminal for the field is based on data stored in the own device diagnosis result storage unit and the other device determination result storage unit inside the field device, 9. The field device abnormality diagnosis system according to claim 4, wherein normality / abnormality of the device is determined. 10. The field according to claim 4, wherein when the data stored in the other device determination result storage unit contradict each other, a larger determination result is adopted. 11. Equipment abnormality diagnosis system.

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