ABB ACS550 - Page 141

ACS550 User’s Manual 141
Parameters
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 parameter 9906
MOTOR NOM CURR.
• 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 3006
MOT THERM TIME, 3007 MOT LOAD CURVE and 3008
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 the
figure) for the time defined by 3012
STALL TIME. The “User Limit” is
defined in Group 20: LIMITS 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 =
ALARM – When the drive operates in the stall region for the time set
by 3012
STALL TIME:
• An alarm indication is displayed.
• The alarm 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
the figure.
3012 STALL TIME
This parameter sets the time value for the Stall function.
3017 EARTH FAULT
Defines the drive response if the drive detects a ground fault in the motor or motor cables. The drive monitors for
ground faults while the drive is running, and while the drive is not running. Also see parameter 3023
WIRING FAULT.
0 =
DISABLE – No drive response to ground faults.
1 =
ENABLE – Ground faults display fault 16 (EARTH FAULT), and (if running) the drive coasts to stop.
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
90 s
180 s
300 s
600 s
0.6
180 s
A
∞
I
O
/I
N
f
O
/f
BRK
95%
limit
User
Stall region
Torque/
Current
f
Stall frequency
P 3011