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Runtime System

Installation

In order to redundantly operate a control system, the CmpRedundancy redundancy component as well as an additional component, which operates the redundancy link, are available in the runtime system of the PLCs. This additional component is device-specific, but an IP link is usual: CmpRedundancyConnectionIP.

Functionality

  • Links two PLCs to a redundant system

  • Synchronizes the redundancy data

  • Switches over the operating states of the PLCs

  • Records the redundancy events in the logger

    Note

    Events which occur at runtime are recorded on both devices by the loggers of the runtime systems.

Example 1. Example

The configuration file *.cfg for the runtime of a CODESYS Control Win is stored in ProgramData.

[CmpRedundancyConnectionIP]
Link1.IpAddressLocal=192.168.56.1 ; IP address of redundancy link of local PLC
Link1.IpAddressPeer=192.168.56.101 ; IP address of redundancy link of peer PLC
Link1.Port=1205

[CmpRedundancy]
BootupWaitTime=5000
TcpWaitTime=2000
StandbyWaitTime=50 ; This timeout depends on the quality of real time task and communication system
LockTimeout=20 ; Maximum time of timer lock
Bootproject=Application ; Name of your CODESYS application
RedundancyTaskName=MainTask ; Task name in your CODESYS application
PlcIdent=1 ; PlcIdent=2 on other PLC


Boot application

The boot application is stored identically on both PLCs. When you want to update the boot application, it is enough to download it to the active PLC.

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