JPH04117119A - Fault displaying method for supervisory control system - Google Patents

Abstract

PURPOSE:To reduce the transmitting time of the title system even when the number of items to be monitored increases due to an increase in the number of process equipment by only transmitting the registered number of the process equipment when a fault occurs in the process equipment. CONSTITUTION:After a readout word address W and bit position B are initialized, the leading address of an inputted table is set to an RA and whether or not the bit position B of the RA address is to be picked up is checked. When pickup of the bit position B is not required, whether or not the bit position B is to be dropped out is checked. When an address to be picked up exists on the inputted table, the word address W, bit position B, and 'ON' indicating abnormality are set in a transmission buffer together with a station number and transmitted after making a transmission request to a transmission module. When an address to be dropped out exists on the inputted table, on the other hand, the word address W, bit position B, and 'OFF' indicating restoration from abnormality are set in the transmission buffer together with the station number and transmitted after making a transmission request to the transmission module.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention provides a supervisory control system for displaying abnormalities in process equipment on a failure display device such as a CRT display device in a central control room to notify an operator. .

The present invention relates to a failure display method for a supervisory control system in which process abnormalities are input via a distributed controller and a transmission device.

(Prior Art) In conventional monitoring and control systems, operation control of process equipment ( sequence control, etc.)
At the same time, the failure status and operating status of these process equipment are transmitted to a central supervisory controller that centrally monitors the process.

In addition, the central supervisory controller inputs the failure status and operating status of process equipment transmitted from these distributed controllers, and receives the information from the CR connected to the supervisory controller.
The status of the process equipment is displayed on a display device such as a T-display unit as a message screen or a graphic symbol screen to inform the operator of the operating status of the process equipment, thereby centrally monitoring the process.

Figure 1 shows the general configuration of a monitoring system.
1 is a supervisory control controller installed in a central monitoring room or the like, and has a CRT display device 1a and a keyboard 1b.

Further, 3 is a distributed control controller installed near the process equipment, which sends failure signals 4a, 4 of the process equipment 4.
b, 4c, 4d, - are input and connected to the central supervisory control controller 1 via a transmission line 2.

Figure 2 shows a more detailed representation of the system shown in Figure 1, where the supervisory control controller 1 is a microprocessor IC.
, memory 1d, CRT keyboard control module 1e,
and a transmission control module 1f are built in, and the functions of a supervisory control controller are executed using software.

Similarly, the distributed control controller 3 has a built-in microprocessor 3C, memory 3d, process input/output module 3e, and transmission control module 3f, and uses software to execute functions of the distributed control device such as controlling process equipment. Ru.

By using such a configuration, the process equipment failure signal 4a + 4b + 4c + 4d!・・・
* is input via the process input/output module 3e of the distributed control controller 3, stored in the memo IJ3d, and then transmitted to the supervisory control controller 1 via the transmission control module 3f.

In addition, in the supervisory control controller 1, the transmission control module 1f receives the process failure signal transmitted from the distributed control controller 3, stores it in the memory ratio, and then sends it to the CRT via the CRT keyboard control module IC using the failure alarm processing function. Display on the display device 1a.

In such a centralized monitoring and control system, there have been 3 conventional and common methods for checking the failure status of process equipment. The information display method is as follows.

That is, first, the distributed control controller 3 inputs the status signals 4a, 4b, 4c, 4d, etc. of all the process equipment connected to the process input/output device 3e, and holds all the input signals in the memory 3d. do.

FIG. 3 is a diagram explaining the state held in the memory 3d using the conventional method. signals indicating failure conditions such as overload, etc.). In this example, address xx
The input signal from xx to XXXX10m is held, each bit is 110, the input signal is OFF at T,
111 I+ indicates input signal ON.

The status signal of the process equipment inputted onto the memory in this way is transmitted to the supervisory control controller 1 via the transmission control module 1f at a transmission timing of a constant cycle.

In the supervisory control controller 1, the transmission control module 1
The status signals of the process equipment inputted via f are inputted into the memory l- in the same order as in FIG. Since the process status signal is input from the distributed controller 3 at regular intervals, input to the memory l- of the supervisory controller 1 is also performed at regular intervals.

The process status signals input to the supervisory controller 1 are sequentially read out from the memory according to the procedure of the flowchart shown in FIG. 6 and displayed on the CRT display device fila.

That is, as shown in FIG. 6, data is read from memory 1JLd one word (16 bits) at a time.

Checks whether there is a state change depending on each bit's pa 1" or 110", and if there is a state change,
C for pickup (110+1→111+1)
The signal name of the device picked up is displayed on the RT display device, and in the case of dropout (LL I II → 1101+), processing is performed to restore the displayed signal name. Such a procedure is performed for all 48 items, and the failure status of the process equipment is displayed on the CRT display device as a failure list.

However, in conventional monitoring and control systems that use this type of display method, as the target process becomes larger and more complex and the control functions become more sophisticated, the number of process equipment increases, and the number of monitoring items to be centrally monitored also increases. Therefore, as the number of manual points increases, the display on the CRT display device becomes slower.

This is because, in the conventional display method, as the number of monitored items increases, ■ the processing amount of the distributed control controller 3 increases and the processing cycle becomes longer, and ■ the transmission cycle for transmission to the supervisory controller 1 becomes longer. Become.

Furthermore, (2) the display processing amount of the supervisory controller 1 increases, and the processing time increases.

In this case, the increase in the input processing time of the distributed controller in item (■) above can be shortened by installing multiple distributed controllers to perform distributed processing, but regarding items (i) and (i) above, the configuration of the central monitoring control system Processing cannot be distributed from above, so there is a limit to reducing processing time.

(Problems to be Solved by the Invention) As explained above, the failure display method of conventional supervisory control systems suffers from delays in display processing as the number of monitoring items increases due to larger, more complex, and more sophisticated processes. In particular, delays in process equipment failure display processing may amplify process abnormalities, which poses a major problem in the configuration of centralized monitoring and control systems.

SUMMARY OF THE INVENTION An object of the present invention is to provide a reasonable failure display method for a supervisory control system that does not cause a delay in displaying on a CRT display device due to a processing delay even when the number of process equipment increases.

[Structure of the invention]

(Means and effects for solving the problem) In order to achieve the above object, in the fault display method for a supervisory control system according to the present invention, after inputting a process equipment fault signal from a process equipment to a distributed control controller, A change in the state of the input signal is detected, and only when a change in state occurs, the registration number of the fault signal is transmitted to the supervisory controller via the transmission device, and the supervisory controller corresponds to the registration number input in this transmission. Then, a failure message registered in advance in the supervisory controller is displayed as an alarm on the CRT display device.

Additionally, the supervisory controller stores the registration number input during transmission in memory, and calls the stored registration number in response to an operator's request.

By displaying the failure message on the CRT display device, it is possible to display a list of failure states of processes occurring at any time.

Therefore, in the fault display method of the present invention, when a fault occurs in a process device, only the registration number of the fault is transmitted, so even if the number of process devices increases and the number of monitoring items increases,
The number of monitoring items to be actually transmitted is reduced, and the transmission time can be significantly shortened.

Further, since only the registration number of the failure message is input to the supervisory controller, there is no need for the failure state detection process as in the conventional case, and the display processing time can be further shortened.

(Example) An example of the present invention will be described below with reference to the drawings.

The configuration of the supervisory control system according to the present invention is as shown in FIG.
This is the same as that in FIG. 2, and the signal arrangement in the memory of the distributed control controller is also the same as that in the conventional FIG. 3.

FIG. 4 also shows that in the present invention, the supervisory control controller is
FIG. 5A is a diagram showing a display example of a failure message displayed on an RT display device, and FIG. 5A is a diagram showing a display example of a failure message displayed on an RT display device. 3 is a diagram illustrating the structure of transmission data for notifying the process equipment, and includes the number of the station that inputs the failure signal of the process equipment, the input word address and the word address assigned in the memory shown in FIG. 3 of the distributed controller. It consists of the pit position within and the type of occurrence and return.

Further, FIG. 5(B) shows a flowchart showing the procedure for creating a registration number that is transmitted from the distributed control controller to the supervisory control controller when the failure shown in FIG. 5(A) occurs and when the fault is restored.

Also, FIG. 6 shows a procedure for displaying an alarm on a CRT display device for registration number data having the configuration shown in FIG. 7 is a flowchart, and in the present invention, the failure message data shown in FIG. 7 registered in the memory of the supervisory controller is called up and
Display on a display device.

The present invention will now be described in detail with reference to the above-described drawings.

Process equipment failure signals inputted to the distributed controller 3 are arranged in the memory 3d of the distributed controller 3 in the configuration shown in FIG. 3, as in the prior art. The flowchart in FIG. 5(CB) shows the operational procedure for reading out the data shown in FIG. 3 and converting it into the registration number data shown in FIG. 5(A).

This operation is activated at regular intervals, and first initializes the read word address W and bit position B (W←0, B4-o
)L, RA the start address of the input table shown in Figure 3.
(RA4-X X X X+W), then set the RA
It checks whether the B bit position of the address is a pickup, and if it is not a pickup, then it checks whether it is a trot out, and if it is not a drop out, it increments the bit position B and repeats the same operation.
When the check of 16 bits (1 word) is completed, the word address W is incremented, the next word is checked, the entire input table is checked, and the process ends.

In this case, if there is a pickup in the input table, its word address W and bit position [B and ON indicating abnormality occurrence]
into the transmission buffer along with the station number as shown in Figure 5 (A).
Set the following configuration and send a transmission request to the transmission module for transmission output.

Also, if there is a dropout in the input table, the word address W, bit position [B, and OFF indicating abnormal recovery are set in the transmission buffer along with the station number, and a transmission request is sent to transmission module 5 to transmit the data. Output.

Through the above procedure, the failure state of the process equipment detected by one distributed controller is transmitted as a registration number to the supervisory controller.

The registration number of the failure state of the process equipment transmitted to the supervisory controller is output as a message to a failure display device such as a CRT display device in the procedure shown in FIG.

In FIG. 6, in this procedure activated by a transmission input, the data in the transmission buffer is first read, the data of the registration number shown in FIG. W and bit position B
Decompose into. Next, this station number, word address W, and bit position B are converted into the memory address ADS where the display message is stored (ADS4-WX1
6+B), and the contents of the failure message are retrieved from the address ADS. Here, the failure message is input in advance into a table in the memory corresponding to the station number of each distributed control controller in a configuration as shown in FIG. 7, and the retrieved failure message is displayed on the CRT display device.

Also, after the failure message, there is a 0N10FF indicating occurrence/recovery that comes when read from the transmission buffer.
Based on the code, the message ``occurrence'' is displayed if it is ON, and the message ``Recovery'' is displayed if it is OFF.In this way, the failure state of the process equipment is indicated by the occurrence and recovery. C with a message
Displayed on the RT display device.

〔Effect of the invention〕

As explained above, according to the present invention, a distributed control controller detects a failure state of a process device as a recovery from a failure by detecting a change in the status, and only when a change in status occurs or recovery occurs, a supervisory control controller Since the data is transmitted to the supervisory controller, the transmission process to the supervisory controller can be shortened, as well as the display process in the supervisory controller, compared to the conventional supervisory control device that captures status changes by transmitting data at regular intervals. This makes it possible to handle processes that have become larger and more complex, which could not be handled by conventional fault display system monitoring and control systems.
In response to the increasing number of process monitoring items and, therefore, the failure status signals of process equipment due to the advancement of sophistication, the signal processing is distributed to distributed controllers to display the failure status of process equipment on a CRT display. A fault display method for a supervisory control system is obtained that can display a warning without delaying the display response speed regarding the fault display IF report.

Further, according to the fault display method of the present invention, information indicating the fault state of the process equipment, that is, the registration number of the fault message, the registration number of the fault signal message inputted in the distributed control controller, and the memory of the fault signal inputted in the distributed control controller. By associating the bit arrangement within the system, it becomes easy to add and change signals.Furthermore, the method of the present invention requires only the transmission of the failure number, which reduces the transmission load on the transmission line, which conventionally increases with the increase in the number of process equipment. is always constant, and can be used without changing the system configuration even in the future when the number of process equipment is expected to increase due to expansion.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the general configuration of a supervisory control system to which the present invention is applied, FIG. 2 is a diagram showing FIG. 1 in more detail, and FIG. 3 is a diagram showing the fault signal input in the distributed controller memory. FIG. 4 is a diagram showing an example of a process failure display in a supervisory controller according to the present invention; FIG. 5A is a diagram showing a transmission data configuration of a failure item according to the present invention. FIG. 5(B) is a diagram showing the procedure for creating the above data in the present invention, FIG. 6 is a diagram showing the general procedure for displaying a failure message in the supervisory controller according to the present invention, and FIG. 7 is a diagram showing the procedure for creating the above data in the present invention. FIG. 3 is a diagram showing an example of the structure of CRT display data of a failure message. 1... Supervisory control controller 2... Transmission line 3...
Distributed control controller 1a... CRT display device 1b...
・Keyboard 4...Process equipment 4a~
4d Failure signal 1c, 3c...Microprocessor ld, 3d...Memory 1e...
...CRT control module if, 3f...Transmission control module (8733) Agent: Patent attorney Yoshiaki Inomata (1 person)! Concave grass 2 Fig. 4a 4b 4c 4d Fig. 4a 4b 4c 4d

Claims (1)

[Claims] In a method for indicating a failure in a supervisory control system, in which a status signal of a process device is input to a distributed controller, transmitted to a central supervisory controller via a transmission device, and displayed on a display device such as a CRT coupled to the supervisory controller. , Only when a state change occurs, the distributed control controller transmits the pre-memorized registration number corresponding to the state change to the supervisory control controller, and the supervisory control controller transmits the pre-memorized failure registration number corresponding to the transmitted registration number. A fault display method for a supervisory control system, characterized by displaying a message on a display device.