ABB ACS 400 - Page 110

ACS 400 User’s Manual 99
Group 31: Automatic Reset
The automatic reset system can be used for resetting overcurrent, overvoltage, undervoltage and
analog input loss faults automatically. The number of allowed automatic reset operations within a
certain time is selectable.
Warning! If parameter 3107
AR AI<MIN is enabled, the drive may restart even after a long stop
when the analog input signal is restored. Ensure that the use of this feature will not cause physical
injury and/or damage equipment.
Figure 39 Operation of automatic reset function. In this example, if the fault occurs at the moment
“Now”, it is automatically reset if parameter 3101
NR OF TRIALS value is greater than or equal to 4.
Code Description
3101 NR OF TRIALS
Sets the number of allowed autoresets within a certain time. The time is defined with parameter 3102
TRIAL
TIME. The ACS 400 prevents additional autoresets and remains stopped until a successful reset is
performed from the control panel or from a place selected by parameter 1604
FAULT RESET SEL.
3102 TRIAL TIME
The time within which a limited number of fault autoresets is allowed. The allowed number of faults per this
time period is given with parameter 3101
NR OF TRIALS.
3103 DELAY TIME
This parameter sets the time that the ACS 400 will wait after a fault occurs before attempting to reset. If set
to zero, the ACS 400 will reset immediately.
3104 AR OVERCURRENT
0 =
DISABLE
1 = ENABLE
If 1 is selected, the fault (motor overcurrent) is reset automatically after the delay set by parameter 3103,
and the ACS 400 resumes normal operation.
3105 AR OVERVOLTAGE
0 =
DISABLE
1 = ENABLE
If 1 is selected, the fault (DC bus overvoltage) is reset automatically after the delay set by parameter 3103,
and the ACS 400 resumes normal operation.
3106 AR UNDERVOLTAGE
0 =
DISABLE
1 = ENABLE
If 1 is selected, the fault (DC bus undervoltage) is reset automatically after the delay set by parameter 3103
DELAY TIME, and the ACS 400 resumes normal operation.
3107 AR AI<MIN
0 =
DISABLE
1 = ENABLE
If 1 is selected, the fault (analog input signal under minimum level) is reset automatically after the delay set
by parameter 3103
DELAY TIME.
XXX
Time
Trial time
x = Automatic reset
Now
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