Troubleshooting
Extended Local I/O 5-28
Troubleshooting – 1794-ACN(R)15 FLEX I/O ControlNet Adapter Indicators
Indicators Comm A and B
(simultaneously)
Indicator Probable Cause
Off No power, or reset
Red Adapter inoperative
Flashing Red/Green Adapter self-test
Flashing Red/Off Bad node configuration (duplicate address)
Indicators Comm A or B (individually)
Off Channel disabled
Green Channel operational
Flashing Green/Off Temporary network errors
Flashing Red/Off Cable fault, broken cable, redundancy warning
Flashing Red/Green Bad network configuration
STATUS Indicator
Off No power
Flashing Green On-line but not connected
Green On-line, link okay, connected
Flashing Red
I/O module removed, wrong I/O module inserted,
or FLASH program update in progress
Red Critical - adapter failure
REDUNDANT MEDIA
and
A B
or
A B
1771 I/O ControlNet
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