Section 6 1MRK 500 124-UEN
Troubleshooting
88 Operation Manual
Distributed busbar protection REB500
6.2.5 Electrical connection faults
Description Possible Cause Corrective Action
do not work
work
Blocking inputs of the IED s
values
supervision alarm
Check wiring of BU analogue
inputs
Bay Unit (analogue part) is
defective
6.3 Diagnostic (DIA) system - error handling
The Error Handling detects the start-up and repetitive error causes listed under
Table 23. If one of these errors/failures is detected by a target (CIM, CPC or BU)
the permanently blocked state (see Table 24) is activated on the particular target
with the following effects:
• the target is running and can be accessed by the HMI500
• all protection functions (subsystems) are blocked and will not be processed
• the target will show the corresponding alarms and sent distinct Major Error
events (see Section 3.5.8 “Event List”)
The permanent blocking state can only be reset by the LHMI menu on the affected
target:
Clear/Reset Permanent Blocking
Table 23 Start-up and repetitive error causes
Alarm Event Detection setting Description
Version check failed
he target version does not match the version of the
CU CIM target, the target blocks permanently
License check failed
features are activated that are not licensed on this target),
the target blocks permanently
Repetitive BBP blocked Major_Error 016 30 per 600 sec
blocks permanently
Repetitive BFP blocked Major_Error 017 30 per 600 sec
alarm is activated, the target
blocks permanently