ABB ACS880-104

Parameters 419
74.21 Restart delay time Defines restart delay time.
The timer gets active immediately after stop command is
enabled.
0.0
0.0...30000.0 min Restart delay time. 10 = 1min
74.30 Speed observer
enable
Defines the source for Backspin speed observer function
enable signal.
For further information on Backspin speed observer function,
see section Backspin speed observer (page 42).
The function detects whether the motor is spinning and
prevents drive start command until passive motor speed
reduces down to speed region defined as safe to restart by
the user.
It is always recommended to enable restart delay and run for
at least several minutes alongside with the backspin speed
observer function.
ESP CW bit 2
Not selected Backspin speed observer function is disabled. 0
Selected Backspin speed observer function is enabled. 1
DI1 Digital input DI1 (10.02 DI delayed status, bit 0). 2
DI2 Digital input DI2 (10.02 DI delayed status, bit 1). 3
DI3 Digital input DI3 (10.02 DI delayed status, bit 2). 4
DI4 Digital input DI4 (10.02 DI delayed status, bit 3). 5
DI5 Digital input DI5 (10.02 DI delayed status, bit 4). 6
DI6 Digital input DI6 (10.02 DI delayed status, bit 5). 7
DIO1 Digital input/output DIO1 (11.02 DIO delayed status, bit 0). 8
DIO2 Digital input/output DIO2 (11.02 DIO delayed status, bit 1). 9
ESP CW bit 2 Parameter 74.01 ESP control word, bit-2 status controls
enable/disable status of the function.
10
Other [bit] Source selection (see Terms and abbreviations on page 148).
74.31 Restart speed limit
low
Defines top negative speed at which fly-start operation is
permitted.
Together with parameter 74.32 Restart speed limit high, safe-
to-restart speed region is formed.
-7.00
-600.00...0.00 Hz Restart speed limit low. 10 = 1Hz
74.32 Restart speed limit
high
Defines top positive speed at which fly-start operation is
permitted.
Together with parameter 74.31 Restart speed limit low, safe-
to-restart speed region is formed.
7.00
0.00...600.00 Hz Restart speed limit high. 10 = 1Hz
74.33 Observer speed
check time
Defines the time period required for the motor speed
measured by the Backspin speed observer function to stay
within the safe-to-restart speed region before user-start
command is permitted.
30
0.0...32000.0 s Observer speed check time. 1 = 1s
74.39 Measurement delay Defines the time period required for the Backspin speed
observer function to acquire the estimated motor actual
speed.
The default value should be capable in most of the cases.
5.0
3.0...32000.0 s Measurement delay. 1 = 1s
No. Name/Value Description Def/FbEq16