Lenze 9300 - Page 551

Troubleshooting and fault elimination
Troubleshooting
8-3
L EDSVS9332P-E EN 3.0
8.2 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 :
History buffer
8.2.1 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:
c Fault recognition and reaction
d Time of the fault
e Frequency of the fault
cde
The following table shows the assignment of information and codes.
Code and information to be retrieved Memory location
C0168 C0169 C0170 Subcode
1
Active fault
2
History buffer location 1
3
Memory location 2
F
a
u
l
t
r
e
c
o
g
n
i
t
i
o
n
a
n
d
r
e
a
c
t
i
o
n
T
i
m
e
o
f
t
h
e
l
a
s
t
o
c
c
u
r
r
e
n
c
e
Frequency of the immediately
4
Memory location 3
Fault recognition and reaction Time of the last occurrence
F
r
e
q
u
e
n
c
y
o
f
t
h
e
i
m
m
e
d
i
a
t
e
l
y
following occurrence
5
Memory location 4
6
History buffer location 5
7
History buffer location 6
8
Memory unit 7
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