10.2
LED displays
Module diagnostics [MD]
LED (red,
green)
Meaning
Remedy
Off
Logic supply PS not available.
Check connection of logic supply PS.
Illuminated
green
No module diagnostics active
–
Flashes green
Module diagnostics active
Degree of severity "Information"
e. g. switching off load supply PL
–
Flashes red
Module diagnostics active
Degree of severity "Warning"
e. g. parameterisation error
Take appropriate remedial action,
e. g. check parameterisation.
Illuminated red
Module diagnostics active
Degree of severity "Error"
e. g. undervoltage in load supply PL
Take appropriate remedial action,
e. g. check load supply PL.
LED flashes
red quickly
Module ramp-up not yet completed.
System communication not yet initial-
ised.
–
Flashes quickly
green
Module identification (service function)
–
Tab. 11 LED module diagnostics [MD]
Diagnostics and fault clearance
11
Festo — VMPAL-EPL-AP — 2019-08
