Festo CPVSC1-VI Manual page 63

4. Commissioning
LED
Yellow out
*)
Yellow alight
*)
With double−solenoid valves the LED lights up only when there is an electric pulse.
Tab. 4/7: LED display
Festo P.BE−CPVSC−EN en 0301a
With valve plates, the LEDs indicate the switching status of
the valve solenoid coils. The following table explains the
meanings:
Switching position
of the valve
Basic position
Switch position
Basic position
Meaning
Logical 0 (no signal)
Logical 1 (signal present)
Logical 1 but:
operating voltage of outputs below permitted
tolerance range (21.6...26.4 V DC)
or
compressed air supply not OK
or
pilot exhaust blocked
or
servicing required.
4−13