Lenze EVF9333−xV - Manual (Page 448)

Troubleshooting and fault elimination
Troubleshooting
Fault analysis with the history buffer
9
9.2
9.2.2
l
9.2−2 EDSVF9333V EN 6.2−04/2012
Structure of the history buffer
Code Memory unit Entry Note
C0168/1 C0169/1 C0170/1 Memory unit 1 Active fault If the fault is not available anymore or has
been acknowledged:
l The contents of the memory locations
1 ... 7 are moved one memory location
"higher".
l The contents of memory location 8 is
deleted from the history buffer and cannot
be retrieved anymore.
l Memory location 1 is deleted (= no active
fault).
C0168/2 C0169/2 C0170/2 Memory unit 2 Last fault
C0168/3 C0169/3 C0170/3 Memory unit 3 Second to last fault
C0168/4 C0169/4 C0170/4 Memory unit 4 Third last fault
C0168/5 C0169/5 C0170/5 Memory unit 5 Fourth−last fault
C0168/6 C0169/6 C0170/6 Memory unit 6 Fifth−last fault
C0168/7 C0169/7 C0170/7 Memory unit 7 Sixth−last fault
C0168/8 C0169/8 C0170/8 Memory unit 8 Last but six fault
Explanations regarding the codes
C0168 Fault recognition and response to the reaction
l The entry is done as a LECOM error number
l If several faults with different reactions occur at the same time:
– Only the fault is entered the reaction of which has the highest priority
(1. TRIP, 2. message, 3. warning).
l If faults with the same reactions occur (e.g. 2 messages):
– Only the fault which occurred first is entered.
l Exception: An OH3 warning has a higher priority than an OH7 warning.
– A pending OH7 warning is overwritten by the OH3 warning.
– After the OH3 warning has been cancelled, a pending OH7 warning
will be displayed again.
C0169 Time of the fault
l Reference time is the status of the power−on time meter (C0179).
l If a fault is immediately followed by another fault for several times, only
the time of the last occurrence is stored.
C0170 Frequency of the fault
l The time of the last occurrence is stored.
Set C0167 = 1 to delete the history buffer. Delete history buffer