ABB ACS550-01 User Manual page 83

ACS550 User's Manual
Code Description
3013 UNDERLOAD FUNCTION
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
• This condition has lasted longer than the time set by parameter 3014
• Output frequency is higher than 10% of the nominal frequency.
0 = – Underload protection is not used.
NOT SEL
1 = – When the protection is activated the drive coasts to stop. A fault indication is displayed.
FAULT
2 = – A warning indication is displayed.
WARNING
3014 UNDERLOAD TIME
Time limit for underload protection.
3015 UNDERLOAD CURVE
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
.
FREQ
• T = nominal torque of the motor.
M
• ƒ = nominal frequency of the motor.
N
3018 COMM FAULT FUNC
Defines the drive response if the fieldbus communication is lost.
0 = – No response.
NOT SEL
1 = – Displays a fault (
FAULT
2 = 7 – Displays a warning (
CONST SP
3 = – Displays a warning (
LAST SPEED
average speed over the last 10 seconds.
Warning! If you select const speed 7, or last speed, make sure that continued operation is safe when fieldbus
communication is lost.
3019 COMM FAULT TIME
Sets the communication fault time used with 3018
• Brief interruptions in the fieldbus communication are not treated as faults if they are less than the
value.
3021 AI1 FAULT LIMIT
Sets a fault level for analog input 1. See 3001
3022 AI2 FAULT LIMIT
Sets a fault level for analog input 2. See 3001
T
M
(%)
80
60
MOTOR NOM
40
20
0
) and the drive coasts to stop.
IO COMM ERROR
) and sets speed using 1208
IO COMM ERROR
) and sets speed using the last operating level. This value is the
IO COMM ERROR
COMM FAULT FUNC
<
AI MIN FUNCTION
<
AI MIN FUNCTION
UNDERLOAD CURVE
UNDERLOAD TIME
Underload curve types
1
ƒ
N
CONST SPEED
.
.
.
.
.
3
70%
2
50%
5
30%
4
f
2.4 * ƒ
N
7.
COMM FAULT TIME
Start-Up
83