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ControlLogix-XT Data Highway Plus-Remote I/O Interface Module
Publication
1756-IN638A-EN-P - March 2009
Status Indicators
Three status indicators on the module provide information about
your module and the status of each channel. The following tables
outline the indicator condition and the corresponding status, and
explain what each condition means.
OK Status Indicator
State
Description
Recommended Actions
Off
The module is not
operating.
•
Apply chassis power.
•
Verify module is completely
inserted into chassis and
backplane.
Flashing green
The module is
operational, but either:
–
is not routing
messages
–
the controller is not
transferring I/O.
None if no messages are actively
being routed through the module and
no controller transferring I/O.
To route messages or transfer I/O, use
module default configuration or
configure module.
Green
Operational and is
routing messages.
None - this is normal operation.
Red, then off
Performing a self-test.
None - this is normal operation.
Red
In major fault
Reboot module. If red reoccurs, then
replace module.
Flashing red
In major fault or
configuration fault.
Check alphanumeric indicator and
take action described in alphanumeric
display message table on page 21.
