+GF+ RPC D/PID Manual De Instrucciones página 13

Operating Instructions
3.3 Function
4
The type RPC positioner is an electropneumatic positioner for pneumatically operated control valves with single-acting and double-
acting actuators. The type RPC positioner is assembled on the pneumatic actuator and regulates the position of the valve. The type
SPC positioner therefore continuously compares the current position (actual position value) with the specification of the external
standard signal (position setpoint value). If there is a control difference, the electropneumatic control system causes the actuator to
correct the actual position value accordingly.
3.3.1 Process controller RPC PID
The type RPC process controller is integrated in a control loop. The position setpoint value of the valve is calculated from the process
setpoint value and the process actual value via the control parameters (PID controller). The process setpoint value can be specified
by an external signal (or via fieldbus).
No. Designation
1 Valve
2 Pneumatic actuator
3
3 Type RPC Positioner
4 Control air connection
2
1
Type RPC D/PID positioner
13