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Dual-computer redundancy control system and redundancy control/fault monitoring method and apparatus thereof

A control system, dual-machine redundancy technology, applied in general control systems, test/monitoring control systems, program control in sequence/logic controllers, etc., can solve CPU power failure or crash, controlled industrial equipment out of control, etc. question

Inactive Publication Date: 2020-03-13
BEIJING HOLLYSYS AUTOMATION & DRIVE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in actual application scenarios, the PLC is prone to lose control of the controlled industrial equipment due to power failure or crash of the CPU, control network failure, etc.

Method used

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  • Dual-computer redundancy control system and redundancy control/fault monitoring method and apparatus thereof
  • Dual-computer redundancy control system and redundancy control/fault monitoring method and apparatus thereof
  • Dual-computer redundancy control system and redundancy control/fault monitoring method and apparatus thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] figure 1 It is a schematic diagram of a dual-machine redundant control system according to an embodiment of the present application.

[0043] Such as figure 1 As shown, the dual-machine redundant control system provided by this embodiment is used to provide control services to the controlled equipment in the industrial field, and the system includes a first PLC device 10, a second PLC device 20, a first IO module 30 and a second I / O module 40.

[0044] The first PLC device and the second PLC device are actually corresponding PLC controllers, and each controller includes a corresponding power supply module, CPU, bus communication module and redundant communication module. The relationship between the two PLC devices is one master and one backup, that is, when one PLC device acts as the master device to provide control to the controlled device, the other acts as a backup device and is put into use as the master device at any time when the master device fails.

[0045] ...

Embodiment 2

[0054] figure 2 It is a flow chart of a redundancy control method according to an embodiment of the present application.

[0055] Such as figure 2 As shown, the redundant control method provided in this embodiment is applied to the dual-machine redundant control system in this application, specifically to the first PLC device or the second PLC device. The redundant control method specifically includes the following steps:

[0056] S11. Obtain on-site parameters collected by on-site sensors.

[0057] Specifically, the corresponding CPU, such as the first CPU or the second CPU, obtains the on-site parameters collected by the IO module through the corresponding IO module.

[0058] S12. Determine whether the local machine is the main machine or the standby machine.

[0059] After or at the same time when the on-site parameters are obtained, whether it is the main machine or the standby machine, the standard of the main machine or the standby machine is the corresponding info...

Embodiment 3

[0067] image 3 It is a block diagram of a redundant control device according to an embodiment of the present application.

[0068] Such as image 3 As shown, the redundant control device provided in this embodiment is applied to the dual-machine redundant control system in this application, specifically to the first PLC device or the second PLC device. The redundant control device specifically includes a parameter acquisition module 101 , a master-slave judgment module 102 , a first execution module 103 and a second execution module 104 .

[0069] The parameter collection module is used to obtain field parameters collected by field sensors.

[0070] Specifically, the corresponding CPU, such as the first CPU or the second CPU, obtains the on-site parameters collected by the IO module through the corresponding IO module.

[0071] The master-slave judging module is used to judge whether the machine is the main machine or the standby machine.

[0072] After or at the same tim...

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Abstract

The invention discloses a dual-computer redundancy control system and a redundancy control / fault monitoring method and apparatus thereof. The system comprises a first PLC device, a second PLC device,a first IO module and a second IO module. The first PLC device comprises a first power supply module, a first CPU, a first bus communication module and a first redundant communication module. The second PLC device comprises a second power supply module, a second CPU, a second bus communication module and a second redundant communication module. The first redundant communication module and the second redundant communication module are connected through a cable and used for synchronous communication of user configuration logic operation results. The first bus communication module is connected with the two IO modules and the second bus communication module through a first bus. The second bus communication module is connected with the two IO modules and the first bus communication module through a second bus. Because the PLC devices in a main-standby relation can be mutually replaced in a redundant mode at any time when one PLC device breaks down, the problem that a controlled system is out of control is avoided.

Description

technical field [0001] The present application relates to the technical field of automatic control, and more specifically, to a dual-machine redundant control system and its redundant control / fault monitoring method and device. Background technique [0002] Programmable logic controller PLC has been widely used in the industrial field because of its simple structure, easy control, and low price. However, in actual application scenarios, PLCs are prone to lose control of controlled industrial equipment due to CPU power failure or crash, control network failure, and other reasons. For some industrial systems with high reliability requirements, this is unacceptable, and the corresponding control system is required to provide safe and reliable control to prevent the controlled system from getting out of control. Contents of the invention [0003] In view of this, the present application provides a dual-machine redundant control system and its redundant control / fault monitorin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/05G05B23/02
CPCG05B19/058G05B23/0213G05B2219/163
Inventor 李梦晨王伟王官平王建民周东红雷志军朱毅明
Owner BEIJING HOLLYSYS AUTOMATION & DRIVE
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