ABB ACS 400 User Manual page 105

Group 30: Fault Functions
ACS 400 can be configured to respond as desired to certain abnormal external conditions: analog
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
0 =
NOT SEL
No operation.
1 =
FAULT
A fault indication is displayed and the ACS 400 coasts to stop.
2 = 7
CONST SP
A warning indication is displayed and the speed is set according to parameter 1208
3 =
LAST SPEED
A warning indication is displayed and the speed is set to the level at which the ACS 400 was last operating.
This value is determined by the average speed over the last 10 seconds.
Caution: If you select
the analog 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 400 coasts to stop.
2 = 7
CONST SP
A warning indication is displayed and the speed is set according to parameter 1208
3 =
LAST SPEED
A warning indication is displayed and the speed is set to the level at which the ACS 400 was last operating.
This value is determined by the average speed over the last 10 seconds.
Caution: If you select
the panel is lost.
3003 EXTERNAL FAULT
External fault input selection.
0 =
NOT SEL
External fault signal is not used.
1...5 = 1... 5
DI DI
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 400 is stopped and the motor coasts to stop and fault indication is displayed.
94
7 or
CONST SPEED LAST SPEED
7 or
CONST SPEED LAST SPEED
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1 or 3023
AI FLT LIMIT
, make sure that it is safe to continue operation in case
, make sure that it is safe to continue operation in case
2 .
AI FLT LIMIT
7.
CONST SPEED
7.
CONST SPEED
ACS 400 User's Manual