ABB ACS880 Firmware Manual page 324

324 Parameters
No. Name / Range /
Selection
Disable
Enable
Other [bit]
24.42 Speed window
control mode
Description
Speed error
window
Speed error
window
Note that it is parameter
defines the overspeed limit in both directions of
rotation. This is because the function monitors speed
error (which is negative in case of overspeed, positive
in case of underspeed).
WARNING!
In a speed-controlled follower, the speed error
window must not exceed
for a reliable ramp stop. Make sure both
and 24.44 are smaller than
window control disabled) when a ramp stop is
required.
0 = Speed error window control disabled
1 = Speed error window control enabled
0.
1.
See Terms and abbreviations (page
When speed error window control (see parameter
Speed error window control
parameter determines whether the speed controller
only observes the proportional term instead of all three
(P, I and D) terms.
Speed (rpm)
Reference + [ 24.44 ] rpm
Reference
Reference - [ 24.43 ] rpm
Forward
0 rpm
Reverse
Reference + [ 24.43 ] rpm
Reference
Reference - [ 24.44 ] rpm
24.44 (rather than 24.43) that
21.6 Zero speed limit
21.6 (or speed error
169).
enable) is enabled, this
Def / Type
FbEq 16b / 32b
24.43
0
1
24.41 Normal speed control
/ uint16