ABB ACS880 Series, Firmware Manual

Page: 521 / 764

Def / Type
FbEq 16b / 32b Description Name / Range /
Selection No.
ESP CW bit 2 / unit32 Defines the source for Backspin speed observer
function enable signal.
For further information on Backspin speed observer
function, see section
Backspin speed observer.
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.
ABB recommends to always enable the restart delay
and run for at least several minutes alongside with the
backspin speed observer function.
Speed observer
enable 74.30
0 Backspin speed observer function is disabled. Not selected
1 Backspin speed observer function is enabled. Selected
2 Digital input DI1 ( 10.2 DI delayed status , bit 0). DI1
3 Digital input DI2 ( 10.2 DI delayed status , bit 1). DI2
4 Digital input DI3 ( 10.2 DI delayed status , bit 2). DI3
5 Digital input DI4 ( 10.2 DI delayed status , bit 3). DI4
6 Digital input DI5 ( 10.2 DI delayed status , bit 4). DI5
7 Digital input DI6 ( 10.2 DI delayed status , bit 5). DI6
10 Digital input/output DIO1 ( 11.2 DIO delayed status , bit
0).
DIO1
11 Digital input/output DIO2 ( 11.2 DIO delayed status , bit
1).
DIO2
12 Parameter 74.1 ESP control word (page 519) , bit 2 status
controls enable/disable status of the function.
ESP CW bit 2
See Terms and abbreviations (page 169) . Other [bit]
-7.00 Hz / real32 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.
Restart speed limit
low 74.31
10 = 1 Hz / 100 = 1 Hz Restart speed limit low. -598.00 ... 0.00 Hz
7.00 Hz / real32 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.
Restart speed limit
high 74.32
10 = 1 Hz / 100 = 1 Hz Restart speed limit high. 0.00 ... 598.00 Hz
30.0 s / real32 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. Observer speed
check time 74.33
10 = 1 s / 1 = 1 s Observer speed check time. 0.0 ... 32000.0 s
Parameters 521