I understand that an analog constant is a constant numeric value.
We have GX programs where an Analog constant value is connected to the @PV process variable of a P.I.D. module.
If for instance you have a analog constant of 74 and the local cooling setpoint for that P.I.D is 70 Degrees .
won't the P.I.D module always have a 100% output,because it will get data that the temperature is always 74 Degrees
It seems that the module's output will only vary if the local setpoint is changed
There is one example where a maximum select module has two different analog constants connected to two of its @ inputs
It seems that it will always select the higher input,why bother with the second
All these control systems work very well
I am just trying to understand them better