ABB DriveIT ACH550-UH - Page 98

98 ACH550-UH User’s Manual
Start-Up
3010 STALL FUNCTION 0…2 1 0
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 0.5…50.0 Hz 0.1 Hz 20.0 Hz
This parameter sets the frequency value for the Stall function. Refer to Figure.
3012 STALL TIME 10…400 s 1 s 20 s
This parameter sets the time value for the Stall function.
3013 UNDERLOAD FUNCTION 0…2 - 0
Removal of motor load may indicate a process malfunction. The protection is activated if:
• The motor torque drops below the load curve selected by parameter 3015 UNDERLOAD CURVE.
• This condition has lasted longer than the time set by parameter 3014
UNDERLOAD TIME.
• Output frequency is higher than 10% of the nominal frequency.
0 =
NOT SEL – Underload protection is not used.
1 =
FAULT – When the protection is activated the drive coasts to stop. A fault indication is displayed.
2 =
WARNING – A warning indication is displayed.
3014 UNDERLOAD TIME 10…400 s 1 s 20 s
Time limit for underload protection.
3015 UNDERLOAD CURVE 1…5 1 1
This parameter provides five selectable curves
shown in the figure.
• If the load drops below the set curve for longer
than the time set by parameter 3014, the
underload protection is activated.
• Curves 1…3 reach maximum at the motor
rated frequency set by parameter 9907
MOTOR
NOM FREQ.
•T
M
= nominal torque of the motor.
•ƒ
N
= nominal frequency of the motor.
3017 EARTH FAULT 0…1 1 1
Defines the drive response if the drive detects a ground fault in the motor or motor cables.
0 =
DISABLE – No response.
1 =
ENABLE – Displays a fault (16, EARTH FAULT) and the drive coasts to stop.
Group 30: Fault Functions
Code Description Range Resolution Default S
f
Torque
95%
3011
STALL FREQ HI
Limit
User
Stall region
80
60
40
20
0
2.4 * ƒ
N
3
2
1
5
4
T
M
70%
50%
30%
ƒ
N
(%)
Underload curve types
f