Festo MPA Série Guide Rapide page 19

Diagnosis / display status LED for AS−Interface
AS−i Fault 1
Fault 2
on off
off off
flashes on
on flashes Short circuit/overload at input
flashes flashes Additional power supply not applied or undervoltage
on on
AUX/PWR
on
off
Display status LED for inputs
on
off
Note
AS−Interface has an integrated watchdog function
which resets the outputs if the bus communication
fails.
Festo VMPA−ASI−EPL−...−8E8A−Z 0705NH English
Meaning
AS−Interface voltage applied, no fault
AS−Interface voltage not applied
AS−Interface address not set (= 0)
(possibly valves do not switch), periphery fault
Bus communication failed (watchdog expired)
Meaning
Additional supply exists
No additional supply or additional supply failed
1−signal at input/output
0−signal at input/output
19