JPH0467235A - Fault display system for centralized monitoring system - Google Patents

Abstract

PURPOSE:To prevent the delay of display for the fault of a display device due to the delay of the processing time despite the increase of the number of process equipments by storing collectively the state signals of each point of the process equipments for each of these equipments with a decentralized controller. CONSTITUTION:The state signals 30a, 30b ... of the process equipments 30 inputted from these equipments are stored in a memory 22 for each equipment 30. Then these state signals are transmitted to a monitor controller 10 in a fixed cycle via a transmission control module 24. In this case, all equipments are decided faulty if either one of those signals 30a, 30b ... has a bit showing the presence of a fault. Thus the signal trains which are collected into a single point for each equipment 30 are sent to the controller 10 in a fixed cycle. At the side of the controller 10, a fault presence/absence information signal sent from a decentralized controller 20 for each equipment 30 is stored in a memory 14 and then displayed at a CRT display device 11.

Description

DETAILED DESCRIPTION OF THE INVENTION [Objective of the Invention (Field of Industrial Application) This invention relates to a fault indication method for a centralized monitoring system.

(Conventional technology) For example, in a centralized monitoring system that centrally monitors the operating status of each process equipment in each plant, such as a water supply and sewage plant, a garbage treatment plant, and a drainage plant, in a central monitoring room, etc. The process input/output device of the distributed controller installed nearby captures the status of each process equipment, that is, the signals from each process equipment such as running, stopped, and failure, and performs sequence control of each process equipment. At the same time, the status of each of these process devices is transmitted to the monitoring controller in the central monitoring room, which centrally monitors the status. And in the monitoring controller,
By inputting signals representing the status of each process equipment sent from these distributed controllers and displaying the status of each process equipment on a CRT display device or the like as a message or graphic symbol and presenting it to the operator, each process We are conducting centralized monitoring of equipment.

FIG. 1 shows an example of a general centralized monitoring system, in which a monitoring controller 10 is placed in a central monitoring room, which is equipped with a CRT display device fall and a keyboard 12. In addition, a distributed controller 2o is installed near each process device, and each process device 30
The status signals 30a, 30b, . . .
is input and is connected to be transmitted to the central monitoring controller 1o via the transmission path 40.

FIG. 2 shows a more detailed configuration of the centralized monitoring system of FIG. 1. The supervisory controller 10 includes a microprocessor 13, a memory 14, a CRT/keyboard control module 15, and a transmission control module 16, and realizes the functions of the supervisory controller using software. Similarly, the distributed controller 20 includes a microprocessor 21, a memory 22, a process input/output module 23,
and a transmission control module 24, and each process device 30 is controlled by software.

Then, on the distributed controller 20 side, each process device 3
The status signals 30a, 30b, .

On the other hand, on the monitoring controller 10 side, the transmission control module 16 receives the status signals 30a, 30b, . The image is displayed on the CRT display device 11 via the control module 15.

In such a general centralized monitoring system, the conventional method of displaying the failure status of process equipment is that the distributed controller 20 first displays all processes connected to the process input/output module 23. Equipment 30, 30. . . . state signals 30a, 3 of each point from ...
0b, . . . and all the input signals are stored in the memory 22 in the format shown in FIG.

FIGS. 10(a) and 10(b) are an example of a format representing the state stored in the memory 22 according to the failure display method of the centralized monitoring system. I try to save it once regardless of the type.

Note that here, from address XXXX to address XXXX
+n, and in each bit, "0°" indicates that the input signal is off, and "1" indicates that the input signal is on.

In this way, the status signals of the process equipment input into the memory 22 are transmitted to the monitoring controller 10 via the transmission control module 24 at transmission timings performed at regular intervals.

Next, on the supervisory controller 10 side, the status signals 30a, 30b, .
They are input in the same order as a).

Here, since data is transmitted from the distributed controller 20 via the transmission control module 24 at regular intervals, input into the memory 14 is also performed at regular intervals.

Next, the monitoring controller 10 receives the input status signals 30a and 30b of each process device 30.

... according to the procedure of the flowchart shown in Fig. 11,
The data are sequentially read out from the memory 14 and displayed on the CRT display device 11. In the flowchart of FIG. 11, when displaying a failure display list on the CRT display device 11, data is read 17 codes (16 bits) at a time from the memory 14 (steps Sll to 813), and each bit is set to "1" or Check whether there is a state change in "0" (step 514), and if there is a state change, when the state change is picked up ("0"→"1"), the CR1 display device 11 is displayed as shown in FIG. 10 (b). ) The signal names of the picked up process equipment are displayed based on the comparison table shown in (step S15.516). Further, when the state change is dropout ("1"-"0"), a process is performed to restore the displayed signal name (step S15, 517).

By performing this procedure for all signal items (
In steps 8.18 to 521), the failure status of each process device 30 will be displayed on the CR1 display device 11.

In other words, "1" is set in bit number "1" of address XXXX in FIG. This indicates a failure of ``system primary sedimentation tank sludge extraction pump overload''.

(Problem to be solved by the invention) However, in the conventional fault display method of the centralized monitoring system, as the target process becomes larger and more complex, the number of process equipment increases, and it becomes difficult to carry out centralized monitoring. When the number of monitoring items increases, there is a problem in that the display on the CRT display device becomes slower as the number of items increases.

According to the conventional fault display method, as the number of monitoring items increases, (1) the amount of human processing by the distributed controller increases, resulting in a longer processing cycle, and (2) the transmission cycle for transmission to the monitoring controller. (3) The display processing amount of the monitoring controller increases, and the processing time increases. As a result of the combination of factors, the processing time increases as the number of processing points increases, and the CRT display device The display was delayed.

Regarding the input processing time of the distributed controller in (1), the increase in processing time can be avoided by distributing the processing by installing multiple distributed controllers, but (2) , (3) cannot be processed in a distributed manner due to the configuration of the centralized monitoring system, so it has not been possible to reduce the processing time.

This invention has been made in view of these conventional problems, and provides a fault display method for a centralized monitoring system that can prevent delays in display device fault display due to processing time delays even with an increase in the number of process equipment. The purpose is to provide

[Structure of the Invention] (Means for Solving the Problems) The failure display method of the centralized monitoring system of the present invention collects failure information of each process device on the distributed controller side,
Detailed failure information for each point belonging to each process equipment is stored in a storage device for each process equipment unit, and for each process equipment unit, if a failure occurs at any point belonging to the own process equipment unit, the detailed failure information is stored in the storage device. Create failure occurrence information indicating that there is a failure in each process equipment, and if not, there is no failure in each process equipment, and transmit the failure occurrence information for all process equipment to the monitoring controller side by a transmission device, and the monitoring controller side Displays failure occurrence information for all process equipment units from the distributed controller on a display device, and when there is a request to display detailed information for a process equipment unit for which a failure has occurred, the distributed controller displays details about the process equipment unit. A request for transmission of failure information is issued, and in response to the request for transmission of detailed failure information, the distributed controller side reads detailed failure information of each point belonging to the corresponding process equipment unit from the storage device, and sends the detailed failure information to the monitoring controller. The monitoring controller side displays detailed failure information regarding a specific process equipment unit from the distributed controller on the display device.

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

A centralized monitoring system implementing this invention can commonly use the systems shown in FIGS. 1 and 2 as conventional examples, and the software configuration of the microprocessor 14 in the monitoring controller 10 and the microprocessor 21 in the distributed controller 20 This invention is characterized by:

An embodiment of the failure display processing method using these microprocessors 14 and 21 will be described below.

FIGS. 3(a) and 3(b) show the arrangement of status signals 30a, 30b, etc. of each process equipment 30 that are arranged and manually input in the memory 22 in the distributed controller 20. First, each process equipment 30 The status signals 30a, 30b, . . . of the process equipment 30 input from the process equipment 30 are allocated to each bit of 16 bits (one word) for each process equipment and stored in the memory 22. Here, the 16-bit array has an array (signal name) determined by the type of process equipment, such as small pumps, large pumps, discharge valves, inflow gates, etc., so even if the signals are from the same type of process equipment, For example, assume that the signals are placed in the same bit position.

A 16-bit signal arranged like this or process equipment 3
0,30. In the manual processing of the distributed controller 20, the process equipment status signals 30a, 30b, which are manually input from the process input/output module 23 from the process equipment, are input based on this arrangement. It is stored in the memory 22.

Next, the transmission control module 24 is sent to the monitoring controller 10.
The process of transmitting data at regular intervals via

This transmission is performed by the signal arrangement shown in FIGS. 4(a) and 4(b), and this signal arrangement is for all process machines controlled by a centralized monitoring system! 30, 30.・・・
・For each process equipment 30, the one belonging to it
An OR is performed between each bit of 6 bits (1 word), and if a bit indicating a failure is set in either of the status signals 30a, 30b, etc., it is determined that a failure has occurred in the entire process equipment, and in this way, each process A signal train that is collected at one point for each device is transmitted to the monitoring controller 10 at regular intervals.

In other words, as shown in Figure 4 (b), process equipment is installed in each prefecture as a first settling tank sludge extraction pump or process equipment, and usually the first system in each prefecture is Failure items for each sedimentation tank sludge extraction pump include overcurrent, overload, ground fault, water seal failure, low water level, etc.
These are status signals 30a, 30b, etc. such as current status, load status, ground fault status, water sealing status, water level status, etc., which are transmitted from the process input/output module 23 to the distributed controller 20. The microprocessor 21 aggregates this information for each pump in each prefecture and determines if a failure signal is detected in any of the status signals 30a, 30b, etc. belonging to that pump. If so, a signal indicating that a failure has occurred is transmitted to the monitoring controller 10 side for each pump, and if there is no failure signal in any of the status signals 30a, 30b, . . . belonging to each pump, it is determined that no failure has occurred for each pump. The signal is transmitted to the monitoring controller 10 side.

On the supervisory controller 10 side, the failure occurrence information signal of one point for each process device 30 transmitted from the distributed controller 20 side is stored in the memory 14, and the process shown in the flowchart shown in FIG. 11 explained in the conventional example is carried out. Display is made on the CRT display device 11 based on the procedure.

FIG. 5(a) shows a display example of the CRT display device 11. FIG. In the conventional example, status signals for all points representing the status of the process equipment inputted from each process equipment 30 are transmitted from the distributed controller 20 to the monitoring controller 10,
In contrast, in this embodiment, all process equipment 30, 30 is displayed as shown in FIG. 5(a).
．． . . . Process equipment that has a failure at any point is collectively displayed as one point for each piece of equipment. In the example shown in Figure 5 (a), a failure has occurred in either the first sedimentation tank drawer pump of system 1 or the scraper of No. 1 in the final sedimentation tank of system 3, and the system 2 which has not been restored here. , 3 systems, etc., the initial sedimentation tank withdrawal pumps, etc., show no failures in any of them.

In this way, delays in processing speed due to an increase in the number of signal points are prevented.

However, if there is an indication that a failure has occurred in any of the process equipment, the operator will be able to understand where in the process the failure has occurred, and will be able to determine the severity of the failure, how to deal with it, etc. must be understood quickly. Therefore, on the monitoring controller 10 side, the fifth
In the display shown in Figure (a), a guidance message such as "Enter equipment number" is displayed at the bottom of the same screen of the CRT display device 11, and a guidance message such as "Enter equipment number" is displayed to request input of detailed information regarding the process equipment in which the failure has occurred. prompt.

Here, if the operator wants to know the content of the signal of the process equipment, enter the process equipment number on the keyboard.
Manpower starting from 2.

This process equipment number is stored in the memory 14 in an arrangement as shown in FIG. YYY
It is input to Y.

As shown in the flowchart of FIG. 8, the distributed controller 20 converts the input process equipment number into
The state of the organized process equipment is read from Y (step 521) and converted to the address ADR3 in the memory 22 where the state of the organized process equipment is saved (steps 522 to 524), and the contents are transferred to the memory 22 shown in FIGS. 7(a) and (b). (step S25, 526).

The signal indicating the status of the specified process equipment written to zzzz is sent to the transmission control module 24 of the distributed controller 20, similar to the signals grouped together as described above.
C is input to the memory 14 of the supervisory controller 10 via the supervisory controller 10 as shown in FIG. 5(b).
It is displayed on the RT display device 11.

Here, the signal representing the state of the process equipment number selected by the monitoring controller 10 has a 16-bit (1 word) configuration, and this arrangement is shown in FIGS. 4(a) and 4(b).
The signal only indicates the status of the process equipment number shown in , and only one word (16 bits) is sufficient for increasing the number of process equipment signals.

The above procedure will be explained according to the flowchart in FIG. 9. On the distributed controller 20 side, each process device 3
0 failure information is collected, and the detailed failure information of each point belonging to each process equipment 30 is divided into process equipment units and stored in the memory 22 (step 531), and each process equipment unit belongs to its own process equipment unit. If a failure occurs at any point, there is a failure in the process equipment.
If there is no failure, it creates failure occurrence information indicating that there is no failure for each process device, and transmits the failure occurrence information for all process devices to the monitoring controller 10 side.The control module 24
(step 532).

The monitoring controller 10 side displays the failure occurrence information for all process equipment units from the distributed controller 30 on the CRT display device 11 (step S33 534), and when there is a request to display detailed information for the process equipment unit that is determined to have a failure A request is issued to the distributed controller to transmit detailed failure information regarding the process equipment unit (steps S35 and 336).

Next, in response to this detailed failure information transmission request, the distributed controller 20 side reads detailed failure information of each point belonging to the corresponding process equipment unit from the memory 22 and transmits it to the monitoring controller 10 side ( Step S3
7-539).

On the monitoring controller 10 side, the detailed failure information regarding the process equipment in which the failure has occurred, which has been transmitted from the distributed controller 20, is displayed on the CRT display device 11 (steps S40, 541).

Thus, in this embodiment, the process equipment 30°30,.
The human input signals indicating the status of... are collected at one point for each process device in the arrangement shown in FIG. Even if the input signal increases, the amount of transmission processing does not increase, and the display processing time of the monitoring controller 10 on the CRT display device 11 also does not increase. Therefore, any abnormality that occurs in any of the process equipment can be promptly displayed on the CRT display device 11. In addition, by determining the input signal arrangement for each type of process equipment, the human input signals indicating the status of the process equipment can be used even when the status of the displayed process equipment is inquired from the monitoring controller 10 at the operator's request. The content can be expressed with only one word (16 bits), and there is no effect on processing speed when displaying the content, and delays in display speed can be kept to a minimum even when the number of processing points increases. It is.

[Effects of the Invention] As described above, according to the present invention, in the distributed controller, the status signals of each point belonging to the process equipment are stored collectively for each process equipment, and even if there is a failure at any point, For example, a failure occurrence signal is generated for the entire process and transmitted to the supervisory controller, and when the supervisory controller receives a command to request detailed information for the process equipment in which the failure has occurred, the detailed failure status of the relevant process equipment is transmitted. Since the information is transmitted again and displayed on the monitoring controller side, even if the number of status signal points increases due to an increase in the number of process equipment, the increase in transmission time will
Instead of increasing the number of status signal points, which are dozens of points for each process device, the increase in the number of process devices is sufficient, and the transmission time does not increase, and the response speed to display processing and failure display alarms is delayed. It can be processed without any problems.

In addition, the content to be displayed can be displayed all at once for each process device.
Since the detailed contents are displayed using the inquiry function, it is possible to judge unimportant abnormal signals that often occur in general processes for each process equipment, and to notify operators of process abnormalities. You can definitely do it.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an example of a centralized monitoring system using an embodiment of the present invention, FIG. 2 is a block diagram showing a detailed configuration of the above system, and FIGS. 3(a) and (b) are respectively shown above. A data format diagram and a signal name comparison diagram showing an organized arrangement of status input signals of process equipment in a distributed controller in an embodiment, FIG. 4(a), (
b) is a data format diagram and signal name comparison diagram showing the arrangement of batch signals for each process device in the above embodiment, respectively, and FIGS. 5(a) and 5(b) are process devices in a CRT display device in the above embodiment, respectively. An explanatory diagram showing a failure list display and an explanatory diagram showing a process equipment failure details display, Fig. 6 is an explanatory diagram showing the human power signal arrangement of process equipment required service from the monitoring controller in the above embodiment, Fig. 7 (a) , (b) are a data format diagram and a signal name comparison diagram showing the arrangement of response signals to process equipment numbers from the monitoring controller in the above embodiment, respectively, and FIG. 8 shows how response signals are created from the process equipment numbers in the above embodiment. A flowchart explaining the processing steps,
FIG. 9 is a flowchart showing the procedure of the above embodiment;
0(a) and 1(b) are a data format diagram and a signal name comparison diagram showing the arrangement of state signals of conventional process equipment when manually input, respectively, and FIG. 11 is a flowchart showing the procedure of the conventional example. 10... Monitoring controller 11... CRT display device 12... Keyboard 13
...Microprocessor 14...Memory 15...CRT/keyboard control module 16...
- Transmission control module 20...Distributed controller 21...Microprocessor 22...Memory 23...Process input/output module 24...Transmission control module 30...Process equipment 30a, 30b, 30c , --
--...Status signal 40...Transmission line

Claims (1)

[Claims] On the distributed controller side, failure information of each process equipment is collected, and detailed failure information of each point belonging to each process equipment is stored in a storage device for each process equipment. For each process equipment unit, if a failure occurs at any point belonging to the process equipment unit, there is a failure in the process equipment unit, otherwise, there is no failure in the process equipment unit. The information on the presence or absence of failure is transmitted to the monitoring controller side by a transmission device, and the monitoring controller side displays the information on the presence or absence of failure occurrence for all process equipment units from the distributed controller on the display device, and the information on the presence or absence of failure occurrence for all process equipment units from the distributed controller is displayed on the display device, When there is a request to display detailed information about the process device, a request is made to the distributed controller to transmit detailed failure information for the process equipment unit, and the distributed controller side responds to the detailed failure information transmission request and displays the information about the corresponding process. Detailed failure information of each point belonging to a device unit is read from the storage device and transmitted to the monitoring controller side, and the monitoring controller side displays detailed failure information regarding the specific process device unit from the distributed controller on the display device. A fault display method for a centralized monitoring system characterized by displaying a fault in a central monitoring system.