JPS6170614A - Process monitor device - Google Patents

Abstract

PURPOSE:To monitor an abnormal operation state at once corresponding to the operation states of processes by storing a limit value storage means with limit value patterns having upper and lower limit values in the normal operation of plural processes and reading and comparing limit value patterns according to the operation states. CONSTITUTION:A memory 3 is stored previously with the limit value patterns having the upper and lower limit values for plural process a data corresponding to the operation states of the processes. The limit value patterns indicate values for the process data in the normal operation. Further, a microprocessor 1 has an operation state judging function which inputs a command set on a CRT display device 4, operation signal, process detection signal, etc., and judges the operation states of the processes, a comparing function which reads a limit value pattern corresponding to the operation state out of the memory on the basis of the judgement result of the judging means, and a function which displays the comparison result of the comparing function on the CRT display device 4.

Description

[Detailed description of the invention] [Technical field of invention] The present invention relates to improvements in process monitoring equipment.

[Technical background of the invention and its problems]

A process control device that uses a computer is equipped with a CRT so that operators can easily grasp the operating status of the process.
A monitoring device using a graphic display (hereinafter abbreviated as a CRT display) is provided, and the operating state of the process is monitored by displaying process data, target values, etc. on the CRT display.

When monitoring the abnormal operating state of a process, it is necessary to determine whether the process data is within a certain predetermined upper and lower limit value, and to determine whether the deviation between the process data and the target value is within a predetermined range. The judgment result is displayed on the CRT display.

Incidentally, the process data has an allowable range depending on the operating state of the process, such as the flow rate, pressure, etc., when the value serving as the load changes, or when the load is constant at a predetermined value. However, the upper limit and lower limit values set in conventional devices are set to have a wide range of limit values so that they can be applied to any load condition.

Therefore, there may be a delay in determining the occurrence of an abnormality during process operation, which may cause problems in process operation.

[Purpose of the invention]

The present invention has been made based on the above-mentioned circumstances, and its object is to provide a process monitoring device that can quickly monitor abnormal operating conditions according to the operating conditions of the process.

[Summary of the invention]

The present invention stores in advance a limit value pattern having an upper limit value and a lower limit value during normal operation of a plurality of processes according to the operating state of the process in a limit value storage means, and based on the determination result of the operating state determining means. The process reads the limit value/terf corresponding to the operating state from the limit value storage means, compares the limit value pattern with the process data of the process by means of the comparison means, and displays the comparison result. It is a monitoring device.

[Embodiments of the invention]

An embodiment of the process monitoring device according to the present invention will be described below with reference to FIGS. 1 to 3. FIG. 1 is a block diagram of a process monitoring device according to the present invention. This process monitoring device connects a central processing unit (hereinafter referred to as a microprocessor) 1 via a path 2 to a memory 3, a CRT controller 5 of a display 4, and an operating terminal 6-. 1-6
A configuration in which a process input/output port (hereinafter abbreviated as I10?-port) 8, which is an input/output device for the operation signal to -n and the process detection signal from the detection terminals 7-1 to 7-n, is connected. It has become.

Now, a limit value pattern having an upper limit value and a lower limit value for a plurality of process data corresponding to the operating state of the process is stored in advance in the memo +)3. In other words, the operating state of the process is such that the load values such as flow rate and pressure change over time, or the process is operated at a constant load, but the process data changes at a constant rate of 74 turns for each of these states. . Therefore, the limit value pattern / indicates values for process data during normal operation corresponding to these conditions.

Further, the microprocessor 1 has the following functions. That is, the operating state judgment function receives target values set by operating the CRT display 4, operation signals, process detection signals, etc. to judge the operating state of the process, and the memory 3 A comparison function that reads out the limit value pattern corresponding to the operating state from and compares this limit value pattern with process data.
This is a display function for displaying the comparison results obtained by this comparison function on the CRT display 4.

Next, the operation of the apparatus configured as described above will be explained according to the monitoring flowchart shown in FIG. When the man-machine interface provided in the CRT display 4 is operated to request storage of limit values and turns corresponding to each operating state of the process, the microprocessor 1 determines this and stores the limit value ψ. Issues a turn memorization command. As a result, a plurality of limit value patterns input through the man-machine interface of the CRT display 4 are stored in advance in a predetermined area of the memory 3 through the wire 2.

In process control, the output signals of the detection terminals 7-1 to 7-n, that is, the process detection signal, are transmitted from the I10 port 8 to the path 2 at predetermined intervals according to a command issued from the microprocessor 1 to a predetermined value for storing data in the memory 3. Stored in the area as process data. microprocessor 1
calculates and determines the deviation between the stored process data and the target value, creates an operating signal that makes this deviation zero, and sends it from each port 8 to the operating terminals 6-1 to 6-n1c. This provides control of the process.

Here, when a request is made to display the difference between the current process data and its limit value pattern from the man-machine interface of the CRT display 4, the microprocessor l uses its operating state judgment function to display the υ target value and the operation signal. to determine the operating status of the process. Then, the microprocessor 1 reads out the limit value pattern corresponding to the operating state from the limit value pattern stored in the memory 3 based on this judgment result via path 2, and reads out the limit value pattern and the current 110 port pattern based on this judgment result. The data is compared with the process data taken in through the memory 3 and stored in the memory 3. Then, the deviation between the limit value and the intermediate value of the arm turn and the process data is calculated, and this comparison result is sent to the CR via pass 2.
It is sent to the T controller 5 and also issues a display command. Since these comparison results and display commands are taken in, the CRT controller 5 transfers the comparison results to the CRT.
7'Displayed on the screen]. Figure 3 is a CRT
An example of a display displayed on f display 4 is shown. L7 and L2 shown in FIG. 3 are the upper limit value and the lower limit value, which is the limit value/arm turn. That is, the CRT display gray 4 contains the comparison results corresponding to each operating end 6-1-6-n and each detecting end 7-1 to 7-n, that is, the difference between the limit value and the intermediate value of the main turn. Displayed as a bar graph. The closer this bar graph is to zero, the more normal process operation is being performed, and the longer this bar graph is, the more abnormal operation is occurring. Furthermore, whether the direction of the deviation is positive or negative is also displayed by the direction of the bar graph.

In this way, in the apparatus of the present invention, a limit value/lean having a plurality of upper and lower limit values depending on the operating state of the process is stored in the memory 3 in advance, and this limit value nonaturn is compared with process data. Since this comparison result is displayed on the CRT display 4, the current operating state of the process can be monitored according to the operating state. The knob, each operating end 6-1 to 6-n, and each detection end 7-1 to 7-n can be monitored according to their operating status, which allows for quick confirmation of abnormal process operation. f runt is operated safely.

〔Effect of the invention〕

According to the present invention, a limit value pattern having an upper limit value and a lower limit value during normal operation of a plurality of processes according to the operating state of the process is stored in the limit value storage means, and this limit no-turn is read out according to the operating state. Since the process data is compared with the process data by the comparison means and the comparison result is displayed, it is possible to provide a process monitoring device that can quickly monitor abnormal operating conditions according to the operating conditions of the process.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the process monitoring device according to the present invention, FIG. 2 is a monitoring flowchart showing the operation of the device shown in FIG. 1, and FIG. 3 is the display of the CRT display shown in FIG. 1. It is a figure showing an example. I...Central processing unit (microprocessor), 2...
・Path, 3...Memory, 4...CRT display, 5...CRT controller, 6...Operation end, 7.
...Detection end, 8...I10 port. Figure 1/-17-n b-1[:)-n Figure 2 Figure 3

Claims (1)

[Claims] a limit value storage means for storing a limit value pattern having an upper limit value and a lower limit value during normal operation of a plurality of the processes according to the operating state of the process; an operating state determining means for determining the operating state of the process; a comparison means that reads process data of a process and compares the process data with a limit value pattern read from the limit value storage means based on the judgment result of the operation state judgment means; and a comparison means obtained by the comparison means. 1. A process monitoring device comprising display means for displaying results on a cathode ray tube display device.