Lenze 9300 Series Operator's Manual page 19

3.2
3.2.1
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Troubleshooting and fault elimination
Error analysis with the history buffer
•
The history buffer is used to trace faults.
•
Error messages are stored in the order of their occurence.
Double-click the entry "Diagnostics dialog" in the parameter menu of GDC to open the dialog box
Diagnosis 93xx :
Structure of the history buffer
•
The history buffer provides 8 memory locations. The fields under "Fault history" show the
memory locations 2 to 7.
•
The fields under "Actual fault" show memory unit 1. It contains information on the active fault.
– The first memory unit is written only after the elimination or acknowledgement of the active
fault. This entry eliminates the last fault from the history buffer so that it can no longer be
read.
•
The history buffer holds three information units for every error that had occurred:
The following table shows the assignment of information and codes.
Code and information to be retrieved
C0168
Fault recognition and reaction
Fault recognition and reaction
Time of the fault
Frequency of the fault
C0169
Time of the last occurrence
Troubleshooting
History buffer
C0170
Frequency of the immediately
following occurrence
Memory location
Subcode
1
Active fault
2
History buffer location 1
3
Memory location 2
4
Memory location 3
5
Memory location 4
6
History buffer location 5
7
History buffer location 6
8
Memory unit 7