ABB ACS550-01 User Manual page 106

106
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
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
0 = – No drive response to ground faults.
DISABLE
1 = – Ground faults display fault 16 (
ENABLE
3018 COMM FAULT FUNC
Defines the drive response if the fieldbus communication is lost.
0 = – No response.
NOT SEL
1 = – Displays a fault (28,
FAULT
2 = 7 – Displays a warning (2005,
CONST SP
remains active until the fieldbus writes a new reference value.
3 = – Displays a warning (2005,
LAST SPEED
average speed over the last 10 seconds. This "alarm speed" remains active until the fieldbus writes a new
reference value.
Caution: If you select
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
Start-Up
MOTOR NOM
EARTH FAULT
1 ) and the drive coasts to stop.
SERIAL ERR
/
I O COMM
/
I O COMM
7, or , make sure that continued operation is safe when fieldbus
CONST SP LAST SPEED
<
AI
<
AI
UNDERLOAD TIME
T
M
(%)
Underload curve types
80
60
40
20
0
), and (if running) the drive coasts to stop.
) and sets speed using 1208
) and sets speed using the last operating level. This value is the
.
COMM FAULT FUNC
.
MIN FUNCTION
.
MIN FUNCTION
ACS550 User's Manual
.
UNDERLOAD CURVE
.
3
2
1
4
ƒ
N
WIRING FAULT
7. This "alarm speed"
CONST SPEED
COMM FAULT TIME
70%
50%
5
30%
f
2.4 * ƒ
N
.