4 Commissioning
94 Festo – P.BE-MPA-EN – 1309f – English
4.5.1 MPA-S valve terminal with CPX terminal or CPI connection
The two-colour LEDs on the valves have a double function.
– When illuminated yellow, the LEDs display the switching status of the solenoid coils.
– When illuminated red during operation, the LEDs indicate an error in the electronic module.
LED
Position of the valve Correct status Error status
Dark – Normal position Logic 0 (signal not present) —
– Activated — Logic 0 but MO actuated
Lights up
yellow
– Activated Logic 1 (signal is present) —
– Normal position — Logic 1 but:
– The compressed air supply
is not OK or
– The pilot exhaust is
blocked or
– Servicing required
Illumin-
ated red
–Inthestarting
phase for approx.
2seconds
Check phase when the supply
voltage has been switched on
—
– During operation — Electronics description of
the MPA pneumatics module
Flashing
red
– During operation — MPA-S with electronics module
VMPA…-FB-EM…-D2…:
electronics description of
MPA pneumatics module
Tab. 4.6 Signific ance of the LED display (MPA-S valve terminal wit h CPX terminal or CPI module)
Further instructions on commissioning and diagnosing the MPA pneumatics modules can
be found in the MPA-... electronics description.
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