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PLC redundancy control method and system

A programming controller, redundant control technology, applied in general control systems, control/regulation systems, program control in sequence/logic controllers, etc., can solve problems such as low reliability, improve system reliability, solve Less reliable effects

Active Publication Date: 2014-07-23
北京龙鼎源科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The embodiment of the present invention provides a programmable controller redundant control method and system, to at least solve the technical problem of low reliability of the redundancy method adopted in the prior art

Method used

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  • PLC redundancy control method and system

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Embodiment 1

[0031] According to an embodiment of the present invention, a programmable controller redundancy control method is provided, the method comprising:

[0032] S1, judging whether the main processor and / or the main bus fail;

[0033]Optionally, in this embodiment, the above programmable controller redundancy control method may be applied to, but not limited to, a medium-sized hybrid programmable controller (PLC, Programmable logic controller). Optionally, in this embodiment, the main processor corresponds to the standby processor, the main bus corresponds to the standby bus, and the main I / O device corresponds to the standby I / O device. combine figure 1 As shown, in this embodiment, the system for implementing the above-mentioned programmable controller redundancy control method includes main processor CPU Module_1, standby processor CPU Module_2, switches Switch1, Switch2, main bus SYS_NET1, standby bus SYS_NET2, and The primary I / O device is I / O Module1, and the standby I / O d...

Embodiment 2

[0097] According to an embodiment of the present invention, a programmable controller redundant control system is also provided, such as Image 6 As shown, in this embodiment the system includes:

[0098] (1) The main processor 602 is configured to be connected to the main bus and the standby bus respectively;

[0099] (2) The standby processor 604 is configured to be connected to the main bus and the standby bus respectively, and to be connected to the main processor;

[0100] Optionally, in this embodiment, the main processor and the standby processor are mutually backed up, and the main bus and the standby bus are mutually backed up.

[0101] Optionally, in this embodiment, the above programmable controller redundancy control method may be applied to, but not limited to, a medium-sized hybrid programmable controller (PLC, Programmable logic controller). Optionally, in this embodiment, the main processor corresponds to the standby processor, the main bus corresponds to the...

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Abstract

The invention discloses a PLC redundancy control method and system. The method comprises the steps that whether a main processor and / or a main bus has faults is judged, wherein the main processor corresponds to a standby processor, and the main bus corresponds to a standby bus; if the main processor has faults, the main processor is switched to the standby processor; if the main bus has faults, the main bus is switched to the standby bus; if the main processor and the main bus have faults, the main processor is switched to the standby processor, and the main bus is switched to the standby bus. The method and system solve the technical problem that in the prior art, a redundancy mode is low in reliability, and the technical effect of improving system reliability is achieved.

Description

technical field [0001] The invention relates to the field of industrial control, in particular to a programmable controller redundant control method and system. Background technique [0002] With the increasing demand for system products with higher reliability every year, programmable logic controller (PLC, Programmable logic controller) is one of the main control products in the field of industrial control, and the development of PLC with redundant functions has become one of the important direction of development. [0003] The redundancy methods adopted by the existing programmable controller PLC mainly include the following methods: [0004] 1) For processor redundancy alone, traditional processor redundancy usually uses two processors, and realizes data synchronization after switching through a dedicated redundant hot standby module. This method is only for processors. For PLC The other components of the system did not make a reasonable redundant configuration; [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/05G05B9/03
Inventor 徐仁佐阚伟
Owner 北京龙鼎源科技股份有限公司
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