JPH11296223A - Process monitor and control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a process monitor and control device capable of detecting an abnormal change in a process in process drive controlling operation. SOLUTION: The process monitor and control device for outputting a control command from a central processing unit (CPU) to a process equipment 3 or inputting a state signal of the equipment 3 is provided with a database 23 containing the data expressing the tendency of the state input signal of the equipment 3 against the control command output signal to the equipment 3, and a comparing processing part 24 for comparing data in the database 23 with the control command output signal and the state input signal. Data based on plural variables corresponding to the variation of data to be checked by the equipment 3 are stored in the database 23.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to water and sewage systems, buildings,
The present invention relates to a process monitoring control device for a factory facility and a production plant.

[0002]

2. Description of the Related Art A conventional process monitoring control apparatus of this type will be described with reference to FIG.

[0003] In the figure, the plant monitoring and control device is C
The system includes an RT display device 1 and a controller 2, and monitors and controls the process equipment 3 by these plant monitoring and control devices. The CRT display device 1 displays the control state of the plant including the process equipment 3, and displays an operation such as a start command of the process equipment 3 on the display “operation” of the icon 11.
Is performed. On the other hand, the controller 2 performs input / output processing between the CRT display device 1 and the process device 3, receives an output request from the CRT display device 1 and operates the process device 3, And an input processing unit 22 for processing a signal from the device 3.

In the above-described process equipment 3, for example,
In the case of a sewage treatment plant, a pump 31 is provided. When the pump 31 is started, the flow rate of the treated water changes, and a signal corresponding to the change amount is sent to the CRT display device 1 through the input processing 22. It is displayed.

Although not shown, the CRT display device 1 is provided with a well-known mouse and pointing device, and the operator uses the mouse and pointing device to input a request to the process equipment 3. It has a configuration.

In such a configuration, the current state of the process equipment is displayed on the CRT display 1, and when an operator inputs a request to operate the process equipment 3 while viewing the display on the screen of the CRT display 1. The data corresponding to the request is output from the output processing unit 21 of the controller 2.

Further, the operating state of the process equipment 3 operated by the output from the output processing unit 21 and various process equipments 3 whose process state changes due to the operation of the process equipment 3, that is, the pump in the present embodiment. 11 data is input to the input processing 22.

As described above, in the present embodiment, which is a sewage treatment process, the activation request of the pump 31 which is one of the process equipments 3 is made by the “operation” of the icon 11 displayed on the CRT display 1. Is instructed by a mouse or a pointing device, and the activation request activates the pump 31 through the output process 21.

When the pump 31 is started, the flow rate of the treated water changes, and a signal corresponding to the change is displayed on the CRT display 1 via the input processing 22.

[0010]

However, in such a conventional process monitoring and control apparatus, there is no connection between a device that controls the operation of a process and a process whose operating state changes due to the operation of the device. For this reason, there is a problem that it cannot be determined even if there is an abnormality in the change of the process with respect to the driving operation.

SUMMARY OF THE INVENTION An object of the present invention is to provide a process monitoring control apparatus which can detect an abnormal change in a process in response to a process operation control operation.

[0012]

According to the present invention, there is provided a process monitoring control device for outputting a control command from a central processing unit to a process device and for inputting a status signal of the process device. A database in which data indicating the tendency of the process device with respect to the control command output signal with respect to the control command output signal is stored in advance, and a comparison process of comparing the data of the database with the control command output signal and the status input signal And a unit.

Further, according to the present invention, there is provided the process monitoring control device in which the database stores data based on a plurality of variables corresponding to the amount of change in data to be checked by a process device.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIG.
It will be described based on.

FIG. 1 is a block diagram showing an embodiment of a process monitoring control apparatus according to the present invention. The same parts as those in FIG. 2 are denoted by the same reference numerals, and detailed description thereof will be omitted. Of the process monitoring control device according to the present invention will be mainly described.

In FIG. 1, the controller 2 stores data indicating the relationship between input data to the input processing unit 22 and output data from the output processing unit 21 in addition to the input processing unit 22 and the output processing unit 21. Database 23,
In addition, a comparison processing unit 24 for judging a difference between the input data and the data stored in the database 23 is added to the configuration of the conventional controller 2 (FIG. 2).

In the process monitoring control apparatus according to the present invention having such a configuration, the operator instructs the display “run” from the icons 11 displayed on the screen of the CRT display device 1 by, for example, a mouse (not shown). Then, the instruction signal is sent to the controller 2, and the pump 31 of the process device is activated via the output processing unit 21.

When the pump 31 is started, the flow rate of the sewage changes because of this. Generally, the flow rate of the sewage depends on the capacity of the pump 31. Therefore, the capacity of the pump 31 and the flow rate of the sewage are different. Is stored in the database 23 in advance. Then, when the pump 31 is actually started, the flow rate data of the sewage changed by the start of the pump 31 is compared with the data stored in the database 23 by the comparison processing unit 24, and as a result, if the difference is too large, Since an error is considered to have occurred in the process, an alarm is displayed on the screen of the CRT display device 1.

For example, if the flow rate has not reached the specified value due to the activation of the pump 31, the performance of the pump 31 itself (for example, damage to the motor), the damage to the piping (for example, water leakage), or the flow rate Total performance (for example,
The measurement accuracy may be reduced due to contamination, etc.).

In the above-described embodiment, the data stored in the database 23 is the data corresponding to the flow rate of the sewage water with respect to the activation of the pump 31. The relationship between the two variables of change is stored in the database 23 as data.

In addition, since the discharge amount of the pump 31 varies depending on the water level to be sucked up, in this case, the relation of the three variables is stored as data in the database 23. By changing the variable amount, it is possible to determine a more detailed error.

[0022]

According to the present invention described above, in the process monitoring control apparatus, an abnormal state can be detected from the operation state of the process equipment by the output operation, thereby improving the reliability of the equipment and improving the entire process. The reliability can be greatly improved.

Further, according to the present invention, by changing the data stored in the database in accordance with the performance of the process equipment, a more detailed check can be performed, and the reliability of the entire process including the process equipment can be further improved. Can be done.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of a process monitoring control apparatus according to the present invention.

FIG. 2 is a block diagram showing a conventional process monitoring control device.

[Explanation of symbols]

 1. CRT display device 2. Controller 3. Controller 3. Process device 11. Process device 11. ... icon 21 ... output processing unit 22 ... input processing unit 23 ... database 24 ... …………………………………………………………………………………………………………………… Pump

Claims (2)

[Claims] 1. A process monitoring control device for outputting a control command from a central processing unit to a process device and inputting a status signal of the process device, wherein a status input of the process device with respect to a control command output signal to the process device is provided. A process monitoring control comprising: a database in which data indicating a tendency with a signal is stored in advance; and a comparison processing unit that compares the data of the database with the control command output signal and the state input signal. apparatus. 2. The database according to claim 1, wherein the database stores data based on a plurality of variables corresponding to an amount of change in data to be checked by a process device.
The process monitoring control device as described in the above.