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Fault tracing Chapter 13
Fault tracing and repair
The internal events are time tagged with a resolution of 1 ms and stored in a list. The list can
store up to 40 events. The list is based on the FIFO principle, when it is full, the oldest event is
overwritten. The list cannot be cleared; its content cannot be erased.
The internal events in this list not only refer to faults in the IED, but also to other activities, such
as change of settings, clearing of disturbance reports, and loss of external time synchronization.
The information can only be retrieved with the aid of the PST software package. The PC can be
connected either to the port at the front or at the rear of the IED.
These events are logged as internal events.
Table 24: Events available for the internal event list in the IED
The events in the internal event list are time tagged with a resolution of 1 ms.
This means that when using the PC for fault tracing, it provides information on the:
• Module that should be changed.
Event message: Description Generating signal:
INT--FAIL Off Internal fail status INT--FAIL (reset event)
INT--FAIL INT--FAIL (set event)
INT--WARNING Off Internal warning status lNT--WARNING (reset event)
INT--WARNING lNT--WARNING (set event)
INT--NUMFAIL Off Numerical module fatal error sta-
tus
INT--NUMFAIL (reset event)
INT--NUMFAIL INT--NUMFAIL (set event)
INT--NUMWARN Off Numerical module non-fatal error
status
INT--NUMWARN (reset event)
INT--NUMWARN INT--NUMWARN (set event)
IOn--Error Off In/Out module No. n status IOn--Error (reset event)
IOn--Error IOn--Error (set event)
ADMn-Error Off Analog/Digital module No. n sta-
tus
ADMn-Error (reset event)
ADMn-Error ADMn-Error (set event)
MIM1-Error Off mA-input module status MIM1-Error (reset event)
MIM1-Error MIM1-Error (set event)
INT--RTC Off Real Time Clock (RTC) status INT--RTC (reset event)
INT--RTC INT--RTC (set event)
INT--TSYNC Off External time synchronization sta-
tus
INT--TSYNC (reset event)
INT--TSYNC INT--TSYNC (set event)
INT--SETCHGD Any settings in IED changed
DRPC-CLEARED All disturbances in Disturbance
report cleared
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