TIAX library development workflow and safety

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Hello,   the AX docs describes that using of failsafe CPUs is actually not possible. But does I understand that right that the mentioned exception for TIAX library development workflow means that using TIAX library development workflow is possible with failsafe cpu's today?   Does it mean that I can create a TIA Library with AX and use that with some other code developed e.g. in TIA V18 on a failsafe CPU?   Can someone tell me if and when failsafe is fully supported in AX?   The following controllers are not supported: SIMATIC S7-1500 F with enabled F-activation.Fail-safe functionality is not yet available for any hardware targets. Disable F-activation to use a fail-safe PLC with SIMATIC AX tools.Exception: The SIMATIC AX Debugger is the only tool for PLCs with F-activation for the TIAX library development workflow.   Thanks!
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2 answers
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Hi Christian,

 

Use with activated fail-safe on the PLC is possible with the TIAX Library Workflow in TIA Portal. However, the library types from the TIAX Library Workflow can only be used for the non-safety program code part. It is only applicable to standard code on the failsafe PLC. In addition, I highly recommend implementing the coupling between non-safety and safety code using the approach described on the TIA page in the Safety Programming Guide. The Guide find here

 

If you want to debug your in AX created code with TIAX Library Workflow, you can debug this with the sdb (SIMATIC AX Debugger). This is the reason, why the sdb is currently the only component that can deal with the activated failsafe on the PLC.

 

Here is a brief overview

  • TIAX Library Workflow:
    • Usage of F-PLC with deactivated failsafe: yes
    • Usage of F-PLC with activated failsafe: yes
    • Programming failsafe code in AX: no
    • Programming failsafe code in TIA Portal: yes
  • TIAX Direct loading Workflow:
    • Usage of F-PLC with deactivated failsafe: yes
    • Usage of F-PLC with activated failsafe: no
    • Programming failsafe code in AX: no
    • Programming failsafe code in TIA Portal: no
  • AX Standalone Workflow:
    • Usage of F-PLC with deactivated failsafe: no
    • Usage of F-PLC with activated failsafe: no
    • Programming failsafe code in AX: no
    • Programming failsafe code in TIA Portal: no

 

What would full safety support in AX look like for you? For which workflow should safety be supported (TIAX Direct Loading or AX Standalone)?

 

Happy coding 

Kevin

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Thank you for you feedback. Do you think in a transition phase more on TIAX Library Workflow with Safety or TIAX Direct loading Workflow with Safety?

 

You asked, is there there any plans to support fail-safe code implementation in AX Standalone. Yes, it is. We plan a first release in end of 2026

 

😊🚀

Happy coding 

Kevin

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