Rockwell Automation 1756-DHRIO_DHRIOXT ControlLogix Data Highway Plus-Remote I/O Communication Interface Module - Manual (Page 155)

Rockwell Automation Publication 1756-UM514C-EN-P - June 2014 155
Troubleshooting the Module Chapter 13
Alphanumeric Indicator Status Message - Remote I/O
If the OK indicator is: Module status is: Take this action:
MUTE
LINK No adapters found on remote I/O. Add an adapter to the remote I/O
network.
RACK
OVER Rack overlap on remote I/O. Reconfigure remote I/O racks.
DUPL
SCAN Duplicate scanner on remote I/O. Check remote I/O adapter settings.
MAX_
DEV_ Maximum devices exceeded on remote
I/O. Remove devices to meet limitations on
remote I/O network.
CHAT
LINK Babble detected on remote I/O. Check remote I/O device and network
connections.
OFF_
LINE Not trying to communicate. None. Normal state if controller is not
controlling remote I/O.
OK Normal operation for that channel. None.
Module Status - OK Indicator
If the OK indicator is: Module status is: Take this action:
Off Not operating. Apply chassis power. Verify module is
completely inserted into chassis and
backplane.
Green flashing Operating, but not routing messages
and no controller 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.
Red, then Off Performing self-test. None, normal operation.
Green Operating and routing messages. Verify module configuration.
Red In major fault. Restart module. If red reoccurs, replace
module.
Red flashing In major fault or configuration fault. Check alphanumeric indicator and take
action described in Alphanumeric
Indicator Status Message table.