Festo Контроллер крайних положений SPC11 - Manual (Page 21)

1. Summary of components
1-7
Festo P.BE-SPC11-SYS-EN en 1406e
1.2 Method of operation
Tasks of the SPC11 The SPC11 takes over the following tasks:
– It ascertains characteristic system values of the
connected components
– It saves the desired end positions and intermediate
positions
– It specifies the end positions and intermediate positions
– It compares the nominal and actual positions and controls
positioning by appropriate actuation of the proportional
directional control valve (status control).
Method of operation The SPC11, the valve, the drive and the measuring system
are connected together to form a closed-loop control circuit.
In this closed-loop control circuit, the position of the move-
able mass represents the control variable. This control cir-
cuit is therefore also called positioning control.
In the following text, the term “moveable mass” also refers to
piston, slide and flange shaft.
The following diagram shows the basic layout of a positioning
control circuit with the SPC11.