Rockwell Automation 1771-ASB/E Remote I/O Adapter User Manual - Manual (Page 59)

4–3 Troubleshooting
Publication 1771-UM001A-US-P - February 2000
Recommended Action Probable Cause Description
Indicators
Active Adapter I/O
Fault Rack
Blink On Off Module identification line fault Excessive noise on backplane Identify source of noise. Check power
supply incoming ac power with a line
disturbance analyzer. Monitor scanner
channel for retries to determine if noise
is entering the RIO cable.
Possible problem with block transfer
module. Remove to isolate.
Off Off Off Module not communicating 7 Autoconfiguration 8 unsuccessful
Scanner not configured properly
Power supply fault
Wiring from scanner to adapter module
disrupted
One faulted chassis within a rack group
address causing scanner/distribution
panel to fault all chassis in rack group
address (when in disable search mode)
Check scanner COM indicator;
Steady green - normal;
Blinking green - at least one node on
the link is faulted or failed;
Red - scanner may have a hardware
problem, replace.
Blinking red - all adapters on link have
faulted or duplicate node address
detected
Off - scanner channel has not been
configured to be active on the RIO link
(not online)
Refer to Autoconfigure below.
Check power supply, cable
connections, and make sure adapter
module is fully seated in chassis.
Correct cable and wiring defects
Check sequentially from the first
module to the last module to pinpoint
fault; correct any faults and proceed to
the next chassis
1. You must select the operating mode of the remote I/O adapter module as outlined in the publication furnished with the remote I/O
scanner/distribution panel, remote I/O scanner-program interface module, or I/O scanner-message handling module. Pay close attention to the
disable search mode in the 1771-SD, -SD2.
2. The I/O chassis is in faulted mode as selected by the last state switch on the chassis backplane.
3. Cycling power clears the block-transfer request queue. All pending block transfers are lost. Your program must repeat the request for block
transfers from the chassis.
4. If a fault occurs and the processor is in the run mode but is actually operating in the dependent mode, the chassis fault response mode is
selected by the last state switch on the chassis backplane.
5. The I/O chassis is in faulted mode as selected by the last state switch on the chassis backplane.
6. If excessive chassis faults occur, check switch SWĆ2, position 6 for the OFF position.
7. The adapter considers loss of communication if it sees no transmissions on the RIO network for 100ms or sees 255 transmissions on the RIO
with none to the adapter.
8. Autoconfigure is a feature of the PLCĆ5 processor family.