The library operates primarily within the TwinCAT Safety environment (PLCopen Safety). It relies on a hierarchical structure to map safety devices.
Manually instantiating dozens of FB_Step and FB_Transition blocks can be tedious. FB_StepChain is a manager block that orchestrates a linear sequence of steps. You pass it an array of steps and their associated transitions. The FB_StepChain then executes the sequence, automatically setting the active step index, checking transitions, and advancing the flow. beckhoff sistema library
Practical benefit: You can easily pause (bHold), restart (bRestart), or reset (bReset) the entire chain from a single interface, without writing any step-specific logic for these commands. The library operates primarily within the TwinCAT Safety
The Beckhoff Sistema Library (often referenced under the TwinCAT 3 function Tc3_Sistema) is a software library that allows safety engineers to perform Performance Level (PL) and Safety Integrity Level (SIL) calculations directly within a Beckhoff TwinCAT 3 project. FB_StepChain is a manager block that orchestrates a
Traditionally, SISTEMA is a standalone tool developed by the Institute for Occupational Safety and Health of the German Social Accident Insurance (IFA) . The Beckhoff library embeds the IFA’s certified calculation algorithms into the PLC environment.
The library facilitates the automatic generation of parts of the technical file required for CE marking and machinery directives. The exported data serves as a verified link between hardware and safety theory.