Festo Контроллер крайних положений SPC11 User Manual
Page 22
1. Summary of components
1-8
Festo P.BE-SPC11-SYS-EN en 1406e
1
Measuring system
2
Actual position
value
3
SPC11
4
Valve control
(nominal value)
5
Proportional
directional control
valve
6
Drive, e.g. linear
drive
1
2
3
4
5
6
Fig. 1/2: Positioning control circuit with pneumatic components
The measuring system registers continuously the position of
the moveable mass and transmits this in the form of an elec-
tric signal to the SPC11. The SPC11 compares the current
position with the target position (the “taught” end positions
Po.1 and Po.2 or the intermediate positions Po.3 and Po.4)
and calculates from this value the positioning signal for the
proportional directional control valve.
The proportional directional control valve controls the drive
by pressurising one cylinder chamber and exhausting the
other. The flow is blocked in the valve slide mid-position.