JPS6093503A - Display device for plant supervisory control information - Google Patents

Abstract

PURPOSE:To supervise and control a plant correctly at any time even dissidence occurs between multiplied arithmetic control parts by displaying plant supervisory control information outputted from each arithmetic control part on a display device at the same time. CONSTITUTION:Arithmetic control parts 1A and 1B constitute the dual arithmetic control part of a plant supervisory control system, and they are connected to a process I/O3 through bus lines 2A and 2B to perform the same processing and input and output supervisory control information. Pieces of information obtained individually from the control parts 1A and 1B through bus interfaces 6A and 6B are stored in the memory 9 in the CRT display device 4. In this case, the pieces of information are processed apparently in parallel by time- division processing, etc., and stored. Those pieces of information are synthesized with a predetermined fixed image pattern to form one image pattern, which sent out to a CRT controller 10 and displayed on the CRT7. Consequently, even if a dissidence occurs between the arithmetic control parts 1A and 1B, the plant is supervised and controlled correctly at any time.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a plant monitoring and control information display device in a plant monitoring and control system in which arithmetic and control units are multiplexed.

[Technical background of the invention and its problems] In general, in plant operation, an operator monitors the plant status controlled by a computer using a display device such as a CRT, performs confirmation operations, or when an abnormality occurs. This is done by adding an operation that restores normality.

In such plant monitoring and control systems, the arithmetic control section, which is an important functional section, is usually configured in a redundant manner in plant systems that have a large social impact, such as electric power plants, to ensure the reliability of its functions. It's increasing.

This redundant system simultaneously processes the same work while checking each other, and if there is a discrepancy in the processing results,
This is a system in which both systems use their fault diagnosis functions to discover failures, isolate the faulty one, and continue processing only with the normal one. Therefore, if this system is adopted, a high degree of reliability can be obtained.

However, on the other hand, the redundant system has the problem that fault detection and isolation are complicated, and the process sometimes takes a long time. In this case, if you can know the discrepancy data between the two operator power systems, even if you cannot determine the cause of the failure, you can easily distinguish which system caused the failure based on the progress monitoring of the plant status up to that point. can. Therefore, even if
Even if the failure is a temporary failure that is difficult to detect, it is possible to immediately select the normal one and continue monitoring and controlling the plant. Moreover, the one in which the failure has occurred can be replaced with a normal one and the duplex configuration can be restored again. Furthermore, if a malfunction occurs, it can be repaired later. However, in conventional plant monitoring and control information display devices that employ the duplication system described above, only output data after duplication, that is, data that matches both systems or data that is determined to be normal as a result of failure diagnosis, is displayed on the display device. Therefore, when a discrepancy occurs as described above, it is impossible to determine which system is normal or abnormal, and there is a problem in that the plant status cannot be grasped, even if only temporarily.

[Object of the Invention] The present invention solves the above problems and provides a plant that can always accurately grasp the plant status and always correctly monitor and control the plant even if there is a discrepancy in the multiplexed arithmetic and control units. The purpose of the present invention is to provide a monitoring control information display device.

[Summary of the Invention] Therefore, the present invention is characterized in that the plant monitoring control information outputted from each arithmetic and control section is simultaneously displayed on a display device via a display arithmetic section.

[Embodiments of the invention] An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a configuration diagram of a plant monitoring control information display device according to an embodiment of the present invention.

IB is a duplicated arithmetic and control unit in the plant monitoring and control system. These arithmetic control units IA and IB are both connected to the process input/output device 3 via path lines 2A and 2B, and perform the same processing to input and output monitoring control information. 4 is a CRT display device which is a characteristic part of this embodiment, and includes a calculation section 5 and bus interfaces 6A, 6.
B, and a CRT 7, the arithmetic control section I
A and IB are connected through pass lines 2A and 2B. As can be seen from this figure, the calculation unit 5 always obtains monitoring control information from each calculation control unit IA, 1B.

FIG. 2 shows a detailed diagram of the inside of the CRT display device 4. As shown in FIG.

The arithmetic unit 5 is connected to a memory 9. by an internal bus 8. It is connected to bus interfaces 6A, 6B, and CRT controller 1o. Furthermore, the pass lines 2A and 2B are connected to a separate bus interface 6 from the two arithmetic control units IA and IB.
A and 6B, and the CRT 7 is connected to the CRT controller 1o.

The process from obtaining monitoring control information on such a CRT display device to displaying it on the CRT is shown in FIG. That is, information obtained separately from two bus interfaces, A system and B system, is temporarily stored in memory.

In this case, in Fig. 3, the operations for the two systems A and B are divided into two parts to make it clear that they are performed separately, but the actual calculations are performed using only one calculation unit. Therefore, they are never performed at exactly the same time. However, if the processing is performed in a time-division manner, such as by processing the data alternately, it becomes possible to process the data in parallel. Next, the information is converted into a format required for actual display, and then converted into an actual image pattern. That is, it is made clear which part of the image, what size, and what type of font is to be displayed. The image pattern thus obtained for the information on both systems is combined with a predetermined fixed image pattern (background image, unchanging numerical value, etc.) to form one image pattern. This image pattern (existing on memory 9) is sent to CRT controller 10 and displayed.

FIG. 4 shows an example of an image displayed on a CRT. here,
Monitoring and control information for both systems is displayed regarding the open/close status of the valve named F012 and the pump speed. Therefore, when an operator looks at this display, he or she can immediately determine which display is correct based on the plant operating status up to that point, and can immediately disconnect the faulty arithmetic control unit and continue monitoring and controlling the plant without interruption. You will be able to do this.

In the above embodiments, duplex simultaneous parallel operation of the arithmetic and control units has been described, but needless to say, multiplex simultaneous parallel operation such as triplex operation can be carried out in exactly the same manner.

[Effects of the Invention] As described above, according to the present invention, there is provided a CRT display device which is connected to arithmetic and control units performing multiplexed simultaneous parallel operation and is suitable for simultaneously displaying monitoring control information for multiple systems. As a result, the operator of the supervisory control device can accurately view the supervisory control information of multiple arithmetic and control devices at the same time6.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a plant monitoring control information display device according to an embodiment of the present invention, FIG. 2 is an internal block diagram of the CRT display device of FIG. 1, and FIG. 3 is a processing diagram of the CRT display device of FIG. 1. FIG. 4 is a display screen diagram showing a display example of the CRT shown in FIG. 1. IA, IB...Arithmetic control unit, 2A, 2B...Pass line, 3...Process input/output device, 4...CRT
Display device, 5... Arithmetic unit, 6A, 6B... Bus interface, 7... CRT, 8... Internal bus, 9.
...Memory, 10...CRT controller. Figure 1 Figure 2 Figure 3 A system Figure B system Figure 4

Claims (1)

[Claims] In a plant monitoring and control information display device that displays plant monitoring and control information from multiplexed arithmetic and control units on a display, an arithmetic unit is provided, and this arithmetic unit and each of the aforesaid arithmetic and control units are respectively interfaced. A plant monitoring and control information display device, characterized in that the plant monitoring and control information outputted from each of the arithmetic and control units is processed for display by the arithmetic unit and displayed on the display at the same time.