Leds As Status Indicators Of The Solenoid Coils - Festo CDVI-DN Manual

3. Diagnostics

3.1.3 LEDs as status indicators of the solenoid coils

LED Colour
Off
Yellow
Lit up
Tab. 3/5: LEDs for status indication of the solenoid coils
3-8
There is a yellow LED for each solenoid coil (see Fig. 3/1).
This LED indicates the switching status of the solenoid coil.
Solenoid coil
– Normal position
– Switching position
– Switching position
– Normal position
Meaning
Signal not applied (logical "0")
Signal applied (logical "1") but:
– Load voltage of valves lies below
the permitted tolerance range
( < 21.6 V DC)
Signal applied (logical "1")
Signal applied (logical "1") but:
– Compressed air supply not OK
or
– Pilot exhaust blocked
or
– Servicing required
Festo P.BE-CDVI-DN-EN en 0805a