Hi
I was modifying some code and saw a strategy for heating and cooling that had me wondering.
BAsically the PID output (0-100.0%) is compared to a cyclic (10 seconds)
So, if the heating is called 20% at the PID control block, the heating will be called for 2 seconds out of 10 seconds. Like wise cooling will be called when the PID goes negative. There is a deadband of maybe +/-3%
Does anyone know the name for this type of control, and why anyone would use this rather than the PLC PID function directly
I was modifying some code and saw a strategy for heating and cooling that had me wondering.
BAsically the PID output (0-100.0%) is compared to a cyclic (10 seconds)
So, if the heating is called 20% at the PID control block, the heating will be called for 2 seconds out of 10 seconds. Like wise cooling will be called when the PID goes negative. There is a deadband of maybe +/-3%
Does anyone know the name for this type of control, and why anyone would use this rather than the PLC PID function directly