Product specifications
MOD5 Interface - CI872 Section 5 Maintenance
234 3BSE036351-510 A
DUAL LED is ON The yellow DUAL LED is illuminated when the CI872
module is run in redundant configuration. The module that
has the DUAL LED illuminated is the primary [active]
module in a redundant configuration.
Note: Even if the backup CI872 module runs with errors or
fails in redundant configuration, the DUAL LED is still ON in
primary CI872 module in redundant configuration.
DUAL LED is OFF The yellow DUAL LED is OFF when any of the following
conditions are met:
• CI872 is run in single configuration.
• CI872 is run in redundant configuration, but it acts as a
backup module.
All LED's are OFF Possible Cause 1: Difference in the CI872 position in the
Hardware Tree (in the Control Builder) as compared to the
CI872 position on the CEX-Bus.
Corrective Action 1: Check and correct the position of
CI872 module in the Hardware Tree in accordance with the
position on CEX-Bus, or vice-versa.
Possible Cause 2: The CI872 module is hot inserted and
the configuration is not downloaded to the controller.
Corrective Action 2: Ensure that the module is configured
in the Hardware Tree (in the Control Builder) for that
position, and that the configuration is downloaded to
controller.
Possible Cause 3: The CI872 is just hot inserted and it is in
the process of configuration.
Corrective Action 3: Allow time for the module to initialize.
Table 46. MOD5 Communication Interface, Type CI872 - Indications and Fault Finding (Continued)
Indication Possible Causes, and Corrective Actions (for faults)