WAGO CC100 Persistent Variables Codesys 3.5 Troubles

CODESYS
1

Hi everyone,

I’ve been struggling the whole day trying to get persistent variables to work properly on a WAGO CC100 controller using CODESYS 3.5, but without success.

After rebooting or power-cycling the controller, all values of my variables marked with PERSISTENT or RETAIN are lost.

This is in my GVL variables:
VAR_GLOBAL RETAIN PERSISTENT
Power_Cmd: REAL := 100;
END_VAR

And this is in my GVL.PERSISTENT section:
{attribute ‘qualified_only’}
VAR_GLOBAL PERSISTENT RETAIN
GVL.Power_Cmd: REAL;
END_VAR

I am using this variable in my main task:
IF TO_WORD(GVL.Power_Cmd) <> GVL.SetLoggerActivePower THEN
GVL.SetLoggerActivePower := TO_WORD(GVL.Power_Cmd);
END_IF;

Those are the last changes.

Am I missing something specific for the WAGO CC100 hardware or its runtime configuration?
Is there a working method or configuration to reliably store persistent variables on this controller?

Any help, advice, or working example would be greatly appreciated. Thanks in advance!

2

It’s unclear what you mean by your “GVL.PERSISTENT section”. Did you add a PersisentVars object to your project, and then use the right-click menu to Add All Instance Paths? That is generally the best way to define persistent variables.

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(Once created, you don’t need to reference the PersistentVars object in your POUs, just keep it updated as you add new variables. You have done it correctly with the GVL.Power_Cmd reference.)

1 Like
3

This was exactly what I did.
Will try again tomorrow.

Thanks!