ABB ACS550-01 - Page 105

ACS550 User’s Manual 105
Start-Up
3007 MOT LOAD CURVE
Sets the maximum allowable operating load of the motor.
• When set to 100%, the maximum allowable load is equal to the value
of Start-up Data parameter 9906
MOTOR NOM CURRENT.
• Adjust the load curve level if the ambient temperature differs from
nominal.
3008 ZERO SPEED LOAD
Sets the maximum allowable current at zero speed.
• Value is relative to 9906
MOTOR NOM CURR.
3009 BREAK POINT FREQ
Sets the break point frequency for the motor load curve.
Example: Thermal protection trip times when parameters 3005
MOT THERM TIME, 3006 MOT LOAD CURVE and 3007
ZERO SPEED LOAD have default values.
3010 STALL FUNCTION
This parameter defines the operation of the Stall function. This
protection is active if the drive operates in the stall region (see figure)
for the time defined by 3012
STALL TIME. The “User Limit” is defined in
Group 20 by 2017
MAX TORQUE 1, 2018 MAX TORQUE 2, or the limit on
the
COMM input.
0 =
NOT SEL – Stall protection is not used.
1 =
FAULT – When the drive operates in the stall region for the time set
by 3012
STALL TIME:
• The drive coasts to stop.
• A fault indication is displayed.
2 =
WARNING – When the drive operates in the stall region for the time
set by 3012
STALL TIME:
• A warning indication is displayed.
• The warning disappears when the drive is out of the stall region for
half the time set by parameter 3012
STALL TIME.
3011 STALL FREQUENCY
This parameter sets the frequency value for the Stall function. Refer to
Figure.
3012 STALL TIME
This parameter sets the time value for the Stall function.
Code Description
Frequency
Output current (%) relative
to 9906 MOTOR NOM CURR
150
100
50
P 3007
P 3008
P 3009
60 s
3.5
I
O
= Output current
I
N
= Nominal motor current
f
O
= Output frequency
f
BRK
= Break point frequency
A = Trip time
3.0
2.5
2.0
1.5
1.0
0.5
0
0 0.2 0.4 0.8 1.0 1.2
I
O
/I
N
f
O
/f
BRK
90 s
180 s
300 s
600 s
0.6
180 s
A
∞
f
Torque
95%
3011
STALL FREQ HI
Limit
User
Stall region