ACS 160 User’s Manual 81
Group 31: Automatic Reset
The automatic reset system can be used for resetting overcurrent, overvoltage, undervoltage and
analogue input loss faults automatically. 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 analogue input signal is restored. Ensure that the use of this feature will not cause physical injury
and/or damage equipment.
Figure 18 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 160 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 160 will wait after a fault occurs before attempting to reset. If set
to zero, the ACS 160 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 160 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 160 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 160 resumes normal operation.
3107 AR AI<MIN
0 =
DISABLE
1 = ENABLE
If 1 is selected, the fault (analogue 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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