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Group 30: Fault Functions
ACS140 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 3013
AI1 FAULT LIMIT or
3014
AI2 FAULT LIMT.
0 =
NOT SEL
No operation.
1 =
FAULT
A fault indication is displayed and the ACS140 coasts to stop.
2 =
CONST SPEED 7
A warning indication is displayed and the speed is set according to parameter
1208
CONST SPEED7.
3 =
LAST SPEED
A warning indication is displayed and the speed is set to the level the ACS140
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 ACS140 coasts to stop.
2 =
CONST SPEED7
A warning indication is displayed and the speed is set according to parameter
1208
CONST SPEED7.
3 = LAST SPEED
A warning indication is displayed and the speed is set to the level the ACS140
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 =
DI1...DI5
This selection defines the digital input used for an external fault signal. If an
external fault occurs, i.e. digital input is deactivated, the ACS140 is stopped and
the motor coasts to stop and fault indication is displayed.
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