Construction; Function - GF SPC D/PID Bedienungsanleitung

Operating Instructions
3.2

Construction

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3.3

Function

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The SPC positioner is assembled to a pneumatically driven valve and regulates the position of the valve.
The microprocessor electronics in the SPC positioner continuously compares the current position (actual position value) with the
position setpoint value specified via the standard signal input (or via fieldbus). 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 SPC PID
The type SPC 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).
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Type SPC D/PID positioner
No. Designation
1 Transparent cover
Below decoding module with display and
buttons
2 Housing cover
3 Electrical connection housing
4 Pressure limiting valve
5 Exhaust air connection
Lettering: 3
6 Control air connection
Lettering: 1
7 Electrical connections
8 Supply air filter
No. Designation
1 Valve
2 Pneumatic actuator
3 Type SPC Positioner
4 Control air connection
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