WAGO’s e!COCKPIT engineering software tool is the intuitive programming environment for the controller. The multi-node programming environment can easily transmit the PLC program to both PLCs. For the application-based controller redundancy to be used, a software library with the necessary synchronization functions must be linked to the master PLC. The library offers the possibility of redundantly linking subnodes using a dual LAN . The subnodes, also known as smart couplers, do not have to be programmed; they can be simply booted from an SD card and then configured using an integrated webserver. A large number of the available analog/digital and complex 750 Series I/O Modules are automatically detected.