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ACS 160 User’s Manual
Group 30: Fault Functions
ACS 160 can be configured to respond as desired to certain abnormal external conditions: analogue
input fault, external fault signal and panel loss.
In these cases, the drive can either continue operation at current speed or at a set constant speed
while showing an alarm, ignore the condition, or trip on a fault and stop.
Motor thermal protection parameters 3004 - 3008 provide a means of adjusting the motor load curve.
For example, limiting the load near zero speed might be necessary if the motor does not have a
cooling fan.
Stall protection (parameters 3009 - 3012) includes parameters for stall frequency, stall time and
current.
Code Description
3001
AI<MIN FUNCTION
Operation in case of AI signal drops below fault limit 3022
AI
1
FLT
LIMIT
or 3023
AI
2
FLT
LIMIT
.
0 =
NOT
SEL
No operation.
1 =
FAULT
A fault indication is displayed and the ACS 160 coasts to stop.
2 =
CONST
SP
7
A warning indication is displayed and the speed is set according to parameter 1208
CONST
SPEED
7.
3 =
LAST
SPEED
A warning indication is displayed and the speed is set to the level the ACS 160 was last operating at. This
value is determined by the average speed over the last 10 seconds.
Caution:
If you select
CONST
SPEED
7 or
LAST
SPEED
, make sure that it is safe to continue operation in case
analogue input signal is lost.
3002
PANEL LOSS
Operation in case of control panel loss fault.
1 =
FAULT
A fault indication is displayed and the ACS 160 coasts to stop.
2 =
CONST
SP
7
A warning indication is displayed and the speed is set according to parameter 1208
CONST
SPEED
7.
3 =
LAST
SPEED
A warning indication is displayed and the speed is set to the level the ACS 160 was last operating at. This
value is determined by the average speed over the last 10 seconds.
Caution:
If you select
CONST
SPEED
7 or
LAST
SPEED
, make sure that it is safe to continue operation in case
panel is lost.
3003
EXTERNAL FAULT
External fault input selection.
0 =
NOT
SEL
External fault signal is not used.
1...5 =
DI
1...
DI
5
This selection defines the digital input used for an external fault signal. If an external fault occurs, i.e. digital
input is deactivated, the ACS 160 is stopped and the motor coasts to stop and fault indication is displayed.
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