Cannot input a negative tag value (WinCC 6.0.2)

[Sake_no_oni]

Dear All,

I’m working with WinCC v6.0. I cannot set a negative tag value. If the value is >0, everything is OK. The value is a PID-control (FB41) set point, the data type is float. What am I doing wrong?

Thanks and All the best!

 

[metwally.mustafa]

Dear All,

I’m working with WinCC v6.0. I cannot set a negative tag value. If the value is >0, everything is OK. The value is a PID-control (FB41) set point, the data type is float. What am I doing wrong?

Thanks and All the best!

i think there is a limitation on the set point to be positive only , try to put your function in a reverse action

 

[JRW]

Just put an S (signed) in front of your format

See pic

 

[Sake_no_oni]

Thank you very much, the problem is solved