I would like to have a counter that increments from 0 to 31 and returns to 0 on the increment from 31. The increment would happen every 50 milliseconds. I tried a simple ADD block, but even with a temporary variable and an intervening operation, I received an error. Various combinations of tempor…

The Feedback Column is only available for local Variables. You have opened the global Variables. Greetings Michael

The error read: Global variable ‘si16_Temp_Counter’ is read before written. → you can solve by checkbox si16_Temp_Counter as “fallback” variable at variable list. Check help. why dont you call reset input at CTU when counter >= 31?

Hi @Mike_Fossell , Welcome to the Community! Below the answer from AI: [image] so basically you are already using the elements available in SafeDESIGNER, but I need to learn more about Safety maybe later I’ll give you more inputs. Ciao Valerio

Thanks @Vratislav_Korinek for the hint with the Feedback-Column in the Variable Declaration. Here some pictures from my Training Script. You could try to program this… but it would set a Compiler Error. [image] Instead you have to Program this, and acknowledge the Compiler that you intendet to …

I am using SafeDESIGNER 5.16. I do not see a Feedback column in my variable declaration page. [image] What version of SafeDESIGNER added this?

The Use Case is to implement J1939-76 in the Safety Application. This is the J1939 specification for transmitting Safe Data, on either a white channel (no other devices) or a black channel (other non-safe devices present). The protocol includes a CRC, as well as a sequence. The sequence is increm…

Outstanding! It builds! I’ll have to test it on Monday when I return to the office (working from home today). Why or why does the Global variable tab not include this as well???

Hi @Mike_Fossell , glad you were able to make progress on implementing the counter. The below Help pages expand on the rules for programming implicit feedback in your Safe Application. Programming implicit feedback in FBD This page contains the rules for using feedback variables (including the f…

Thanks Rafael for your input! When I asked Conversational Help “What does it mean feedback on variable declaration in SafeDESIGNER?“ I found your pages (same question I asked with google AI): [image] We have so many data now in the Help (+ I see cases where after AS Help upgrades the location of…

Hi @Mike_Fossell , I think your issue is answered and solved. Can you mark a reply that helped you most as a solution, please? [image]

Safe Designer --- Create a simple free running counter

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valerio.manenti (Valerio Manenti) January 23, 2026, 5:35pm 9

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Safe Designer --- Create a simple free running counter

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