Programming in IEC 61331
Data is stored centrally on the controller and transferred when needed to the reACTION modules, where they are stored in memory. As an alternative to having one program permanently assigned to a module, it is also possible for the controller to dynamically transfer and activate a variety of reACTION programs – even at runtime. A reACTION program can also be executed directly on the CPU for simulation purposes – in slow motion, so to speak.
As with regular I/O modules, cyclic data is transferred using data points, whose number and data type can be set in the module configuration. With cross-communication mapping, these cyclic data points can be exchanged directly between reACTION modules independently of the controller. This also means that reACTION modules can just as easily communicate directly with regular I/O modules.