Troubleshooting and Diagnosis
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6
Troubleshooting and Diagnosis
The following information helps you to identify problems with the multi-input/output device and
interpret diagnostic issues.
6.1
LED Status and Error Indication
The device is providing LED indication for each channel, the communication status and the
fieldbus voltage.
1
LED CH ERR 1 ... 12 for indicating channel errors
2
LED COM ERR for indicating communication errors
3
LED PWR for indicating operation
LED
Indication
Color Information Reason
Remedy
CH ERR
Flashing
Red
Status of the
corresponding
channel
Lead breakage or
short circuit of valve or
sensor connection.
Only available if wire
check is activated and
mode of operation is
not "out of service".
Check the cable wires.
OFF
--
Channel works as
expected.
--
COM ERR
ON
Red
Communicatio
n status.
Hardware error.
Hardware error in the
device. Check the
device and replace if
required.
Flashing
Red
No communication
activity.
Device is not
configured for cyclic
communication.
Check the PROFIBUS
master.
OFF
--
Cyclic communication
with master, class I.
--
PWR
ON
Green Status of the
fieldbus
power.
Fieldbus voltage at the
trunk.
--
OFF
--
No fieldbus voltage at
the trunk.
Check the fieldbus
power supply.
Check the trunk cable.
PWR
COM/
ERR
2
1
3
4
6
5
7
8
9
10
11
12
ERR
CH
®
1
2
3
