ABB ACS800 Firmware Manual page 191

Index Name/Selection
30.10 STALL FUNCTION
FAULT
WARNING
NO
30.11 STALL FREQ HI
0.5 ... 50.0 Hz
30.12 STALL TIME
10.00 ... 400.00 s
30.13 UNDERLOAD FUNC
NO
WARNING
FAULT
30.14 UNDERLOAD TIME
0 ... 600 s
30.15 UNDERLOAD
CURVE
1 ... 5
Description
Selects how the drive reacts to a motor stall condition. The protection wakes up
if:
- the drive is at stall limit (defined with parameters 20.03,
- the output frequency is below the level set with parameter
- the conditions above have been valid longer than the time set with parameter
30.12 STALL TIME.
Note: Stall limit is restricted by internal current limit
TORQ_INV_CUR_LIM.
The drive trips on a fault.
The drive generates a warning. The indication disappears in half of the time set
with parameter 30.12 STALL TIME.
Protection is inactive.
Defines the frequency limit for the stall function. See parameter
FUNCTION.
Stall frequency
Defines the time for the stall function. See parameter
FUNCTION.
Stall time
Selects how the drive reacts to underload. The protection wakes up if:
- the motor torque falls below the curve selected with parameter 30.15,
- output frequency is higher than 10% of the nominal motor frequency and
- the above conditions have been valid longer than the time set with parameter
30.14.
Protection is inactive.
The drive generates a warning.
The drive trips on a fault.
Time limit for the underload function. See parameter 30.13.
Underload time
Selects the load curve for the underload function. See parameter 30.13.
T /T
M N
T = Motor torque
M
(%)
T = Nominal motor torque
N
100
ƒ = Nominal motor frequency
N
80
60
40
20
0
Number of the load curve
03.04
30.10
3
70%
2
50%
1
5
30%
4
2.4 *ýí
ýí
FbEq
20.13 and 20.14)
30.11 and
1
2
3
30.10 STALL
50 ... 5000
STALL
10 ... 400
1
2
3
0 ... 600
1 ... 5
Actual signals and parameters
191