Filter
Top Products
Maintenance
840 USE 106 00 January 2003 189
Detecting Failures in the Primary Backplane
Troubleshooting
Components
To determine which component failed, compare the status of the controller, Hot
Standby module and RIO head to the chart below:
Controller CHS 110 RIO Head Failure Type Description
Stops All LEDs off
except READY
OR COM ACT
displays error
pattern
All LEDs off except
READY
READY on and
COM ACT blinks
four times
The Interface error patterns
are described in
Com Act
Error Patterns, p. 209
Runs as offline All LEDs off
except READY
OR COM ACT
displays error
pattern
All LEDs off except
READY
CHS 110 The Com Act error patterns
are described in (See
Com
Act Error Patterns, p. 209
)
Stops All LEDs off
except READY
All LEDs off except
READY OR COM
ACT displays error
pattern
RIO Head The Com Act error patterns
are described in
Com Act
Error Patterns, p. 209
Stops All LEDs off
except READY
READY on and COM
ACT blinks four times
RIO Cable Failure at
Primary End
In a dual cable system, if only
one cable fails, the Error A or
Error B indicator on the RIO
head lights instead and the
system continues to operate.
When the RIO cable fails at
the Primary end, input data
may be reset to 0 for one
scan because the
communication failure to the
drop occurs before the
broken link is detected.