Publication 1785-UM012D-EN-P - July 2005
Troubleshooting F-7
Blink alternately Off Adapter module not
actively controlling I/O
(2)
Adapter module in
controller restart lockout
mode (adapter to
scanner link is normal)
Controller restart lockout switch on
chassis backplane switch assembly
on
(3)
Press reset button to clear lockout feature
or cycle power; if after repeated attempts
indicators are still blinking, check:
• push button not wired properly to field wiring
arm
• wiring arm not connected to adapter module
• adapter module was reset by process or/
scanner, then immediately faulted
(1)
If a fault occurs and the Controller 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.
(2)
The I/O chassis is in faulted mode as selected by the last state switch on the chassis backplane.
(3)
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.
Indicators Description Probable Cause Recommended Action
Active Adapter
Fault
I/O
Rack
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