I typically use the ProgAuto and ProgManual PIDE inputs to switch between auto PID operation and manual PID operation. When operating in auto operation the setpoint is taken from the SPProg PIDE input and when operating in manual operation the setpoint is taken from the CVProg PIDE input. The auto input is flow rate. The manual input is % of CV. I don't believe that Hand mode will work. Hand mode is used when something else is in control of the device - CV is set to 0.