Lenze EVS93xx - Manual (Page 34)

Troubleshooting and fault elimination
Troubleshooting
Fault analysis with the history buffer
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34 EDKVS93−02 EN 3.0
4.2.2 Fault analysis with the history buffer
The history buffer can be used to trace faults. The fault messages are stored in the 8
memory locations in the order of their occurrence.
ƒ Open the Diagnostics dialog box in the parameter menu.
„
†
‡
ˆ
‰
‚

ƒ
9300std230
Fig. 4−2 "Diagnostics" dialog box
Field
History buffer
location
Entry Note
 ‚ ƒ 1 Active fault If the fault is no longer pending or has been
acknowledged:
l The content of memory units 1 ... 7 is shifted
"upwards" by one memory unit.
l The content of memory unit 8 is removed from
the history buffer and can no longer be retrieved.
l Memory unit 1 is deleted (= no active fault).
„ †
2 Last fault
3 Next to last fault
4 Third to last fault
5 Fourth to last fault
6 Fifth to last fault
7 Sixth to last fault
8 Seventh to last fault
Explanations
, „
Fault indication and fault response (C0168)
l The entry is effected as LECOM error number.
l If several faults with a different response occur at the same time:
– Only the fault the response of which has the highest priority is entered (1. TRIP, 2. message,
3. warning).
l If faults with the same response occur (e. g. 2 messages) at the same time:
– Only the fault that was triggered first is entered.
– The OH7 and OH3 warnings are exceptions. If an OH7 warning is pending and the OH3 motor
temperature threshold is reached, the OH7 warning is overwritten by the OH3 warning. If the
motor temperature decreases again, the OH7 warning reappears.
‚, Time of the fault (C0169)
l Reference time is the content of the power−on time meter ‰.
l If a fault is immediately followed by another fault for several times, only the time of the last
occurrence is stored.
ƒ, † Frequency of occurrence of the fault (C0170)
l The time of the last occurrence is stored.
‡ Click on Fault memory reset to clear the history buffer.
The history buffer can only be cleared if no fault is active.
ˆ Click on TRIP reset to reset the fault.