Beckhoff Sistema Library [top] -

The Beckhoff SISTEMA library provides safety-related characteristic values for Beckhoff's TwinSAFE components, allowing users to model and verify safety functions within the IFA SISTEMA software utility. These libraries are essential for calculating the Performance Level (PL) of machine control systems according to DIN EN ISO 13849-1. Accessing the Library

What is the Sistema Library?

In short, the Sistema library provides the function blocks necessary to synchronize two independent Beckhoff PLCs (a Leader and a Follower) so they act as a single logical unit. beckhoff sistema library

• Purpose: Provide reusable, vendor-supported software components that implement common industrial functions (I/O handling, fieldbus stacks, device management, motion control, diagnostics, system services).
• Composition:
  • Use TwinCAT runtime redundancy, System Library redundancy modules, and EtherCAT redundancy-capable devices to achieve high availability.

  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. Watchdog ( FB_SysWndWatchdog

  • Watchdog (FB_SysWndWatchdog, FB_SysWdiWatchdog)
  • Time functions (FB_SysTime, FB_SyncTime)
  • File operations (FB_SysFileOpen, FB_SysFileRead, etc.)
  • Process access (FB_SysProcessCreate, FB_SysProcessList)
  • System info (FB_SysCPUUsage, FB_SysMemory)
  • PLC control (FB_SysPlcState, FB_SysPlcStop)

  Unlike low-level libraries that handle bit manipulation or math functions, Sistema provides high-level software patterns. At its heart, the library is built around two primary paradigms: FB_SysWdiWatchdog ) Time functions ( FB_SysTime