CODESYS Redundancy SL Article no. 2302000040

CODESYS Redundancy SL

An extension for CODESYS SoftPLC systems to realize redundant control systems.

Product description

Single Device License

CODESYS Redundancy SL makes it possible to run one and the same IEC 61131-3 application on two independent soft PLC systems at the same time. If a control fails, the passive control is activated. The function enables the mutual monitoring and synchronization of two controllers. The redundant cross-connection between the two controllers is implemented using a TCP/UDP-based protocol. The active controller controls the I/O system, while the passive controller monitors the active controller and synchronizes itself with it. When the redundant system is started up, the first PLC started goes into the “standalone” state until the second PLC is started and synchronized. Then the first changes to the active state, the second to the passive state (standby). If a control fails, there is an automatic switchover. A manual switchover can be initiated via a function interface. The boot application and the memory are updated automatically. IEC timers are synchronized in each task cycle.

Configuration

The configuration in the CODESYS Development System is added in the project via the “Redundancy configuration” object. It provides a configuration editor in which you define the memory areas of the application to be controlled, the relevant task and the time monitoring. It also offers a display of the current status of the two PLC devices during runtime. You can switch the role from passive to active both in the configuration editor dialog and via a library function.