This article was written for automation professionals seeking to enhance their TwinCAT development practices. Always consult the official Beckhoff documentation for the latest library versions and syntax.
| Feature | Tc2_System | Tc3_System | Best Practice | |---------|------------|------------|----------------| | Real-time file I/O | ❌ No | ✅ FB_FileRead (buffered) | Use Tc3_File | | System time (UTC) | ❌ Local only | ✅ FB_LocalSystemTime + UTC | Tc3_System | | CPU usage | ✅ FB_SysCPUUsage | ✅ FB_GetCpuUsage | Tc3_System | | Process list | ✅ FB_SysProcessList | ✅ FB_GetProcessList | Avoid in runtime | beckhoff sistema library
The library eliminates the need for manual data entry of complex safety values. It provides the mathematical proof required to comply with ISO 13849-1 It provides the mathematical proof required to comply
Beckhoff recognized a major inefficiency in the workflow. Why should an engineer calculate safety parameters in SISTEMA and then manually re-enter that configuration into the TwinCAT engineering environment? That duplication of effort is not just time-consuming; it is a vector for human error. beckhoff sistema library