PUMP_PID

Function Block PUMP_PID

General Information

Available as of PLC runtime system	V1.3 and above
Included in library	PUMP_AC500_V23.lib
Type	Function Block without historical values.

This Function Block is used for closed loop control of the process parameter such as pressure.

The setpoint and the actual value are compared and error value is given as input to the PID. PID output is calculated based on the Proportional Gain KP, Integral Time TN, and Derivative Time TD.

Y = KP *(e +1/TN òe dt + TD de/dt) with

Y =PID_OUTPUT

e =Error between SET_VALUE – ACTUAL_VALUE

The PID output is then scaled and converted into required speed reference to the drive of the pump. The output PID_SPEED_REF is internally attached via structures to the PUMP_BOOST_CTRL.

• Input Description
• Output Description