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KFU 2-/4-
132
12.8
Automatic Error Acknowledgment
The automatic error acknowledgment enables acknowledgment of the faults Overcur-
rent F0500, Overcurrent F0507 and Overvoltage F0700 without intervention by an
overriding control system or the user. If one of the aforementioned errors occurs, the
frequency inverter switches the power semi-conductors off and waits for the time
stated with the parameter
Restart delay
579
. If the error must be acknowledged, the
speed of the machine is determined with the quick catching function and synchro-
nized to the rotating machine. The automatic error acknowledgment makes use of
“Quick Synchronization” operation mode, regardless of the
Search run operation
mode
645
. The information given on this function in chapter "Search run" must be
observed.
With parameter
Allowed no. of auto-acknowl.
57
, you can define the number of auto-
matic error acknowledgements which are permitted within 10 minutes.
An acknowledgement repeated above the permissible number within 10 minutes will
result in the frequency inverter being switched off.
The errors Overcurrent F0500, Overcurrent F0507 and Overvoltage F0700 have
separate error acknowledgement counters.
Parameter
Settings
No.
Description
Min.
Max.
Fact. sett.
578 Allowed no. of auto-acknowl.
0
20
5
579 Restart delay
0 ms
1000 ms
20 ms