You can increase the reliability of your control system by providing your PLC with a redundant PLC. The redundant PLC is able to take over the application execution at runtime. This can prevent system failures, for example.
This project (see Redundancy Examples.zip) contains two sample projects and two videos to illustrate the configuration.
See also https://help.codesys.com/webapp/_cds_struct_redundancy;product=codesys;version=3.5.17.0
System requirements and restrictions
System requirements and restrictions
Info
Programming System
CODESYS Development System Version 3.5.17.0 or higher