Rockwell Automation 1756-DHRIO_DHRIOXT ControlLogix Data Highway Plus-Remote I/O Communication Interface Module - Manual (Page 154)

154 Rockwell Automation Publication 1756-UM514C-EN-P - June 2014
Chapter 13 Troubleshooting the Module
Status Indicators The following figure and tables describe the module status indicators.
If after powerup, the alphanumeric indicator does not start cycling (or if it stops
cycling) through these messages, see the following tables.
Data Highway Plus
Sequence of display Where
A DH
A#xx
xxxx A is the channel (A or B) and DH indicates network type is DH+.
xx is the channel’s node address.
xxxx is the channel’s status message.
Remote I/O
Sequence of display Where
BIO
SCAN
xxxx B is the channel (A or B) and IO indicates network type is Remote I/O.
SCAN indicates scanner.
xxxx is the channel’s status message.
Power Supply Indicator
If the power indicator is: Power supply is: Take this action:
Off Not operating Turn power switch ON.
Check power wiring connections.
Check fuse.
On Operating None; normal operation
Alphanumeric Indicator Status Message - Data Highway Plus
If the alphanumeric
indicator status message
shows: Network status is: Take this action:
OFF
LINE Data Highway Plus link is in STOP state. Correct the configuration.
DUPL
NODE Data Highway Plus Duplicate node
address. Select another node address and reset
switches.
ONLY
NODE Only node on Data Highway Plus link. Check cables.
CNFG
FALT Incorrect Data Highway Plus routing
table configuration.
Incorrect Data Highway object
configuration. Verify the module is inserted into the
correct slot.
OK Normal operation for that channel. None.
CHA CHB OK
H+/RIO
43241
Power Supply Indicator is
green.
Alphanumeric Status Indicator illuminates and cycles through a
sequence of messages.
Module OK status indicator is solid red,
then flashing green.