User manual

Troubleshooting
Remote I/O 5-21
Troubleshooting – Remote I/O System, 1771-ASB series B
See page 5-24 for footnotes
Indicator Response Description Probable Cause Recommended Action
Active
Adapter Fault
I/O Rack Fault
On
Off
Off
normal indication;
remote adapter is
fully operational
Active
Adapter Fault
I/O Rack Fault
On or off
On
On or off
remote adapter
fault
2
remote adapter not operating; it
will stay in fault mode until fault is
corrected
Cycle power to the chassis to clear
the adapter fault.
3
Replace adapter if fault does not
clear.
Active
Adapter Fault
I/O Rack Fault
On or off
Off
On
I/O chassis fault
2
Problem exists between:
• adapter and module in
chassis; the module will stay in
fault mode until fault is
corrected
• shorted printed circuit board
runs on backplane or I/O
module
Cycle power to the chassis to clear a
problem resulting from high noise.
3
• Remove and replace all I/O
modules one at a time
• Replace adapter
• If the problem does not clear,
something is wrong in chassis or
I/O module
ACTIVE
ADAPTER
FAULT
I/O RACK
FAULT