48 Rockwell Automation Publication 42EF-UM001A-EN-P - September 2015
Troubleshooting
Chapter 10
Troubleshooting
This guide is meant to help resolve common issues that occur when setting up
the 42EF.
Checklist
Error Cause Remedy
Power indicator
LED does not
light up
The power supply is
s
w
itched off.
Check to see if there’s a reason
for it to be
switched off
(installation or maintenance
work, and so on). Switch on
the power supply if
appropriate.
Power indicator
LED does not
light up
The 4-pin M12 plug is
not connected to
the
c
onnector on the sensor
Connect the 4-pin M12 plug
to the sensor and tighten the
cap nut by hand.
Power indicator
LED does not
light up
Wiring fault in the
splitter or contro
l
cabinet.
Check the wiring carefully and
repair any wiring
faults.
“Operator
indi
cator”
LED does not
light up
Supply cable to the
se
n
sor is damaged.
Replace the damaged cable.
No IO-Link
co
nnection to the
device
The C/Q
communication port on
the sensor is not
connected to the IO-
Link master
Make sure that the C/Q
co
mmunication port is
connected to the IO-Link
master.
No IO-Link
co
nnection to the
device
No power supply
See error “Operator indicator”
LED does not light
up.
Pu
sh button does
not respond to
user interface
Local operation has been
de-activated.
Activate local operation.
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