ABB ACS880 Firmware Manual page 262

262 Parameters
No. Name/Value
23.28 Variable slope
enable
Off
On
Other [bit]
23.29 Variable slope rate
2...30000 ms
23.39 Follower speed
correction out
-30000.00 ...
30000.00 rpm
23.40 Follower speed
correction enable
Not selected
Selected
Description
Activates the variable slope function, which controls the
slope of the speed ramp during a speed reference change.
This allows for a constantly variable ramp rate to be
generated, instead of just the standard two ramps normally
available.
If the update interval of the signal from an external control
system and the variable slope rate
rate) are equal, the resulting speed reference
ref ramp output) is a straight line.
Speed reference
Speed
reference
t
A
t = update interval of signal from external control system
A = speed reference change during t
This function is only active in remote control.
Variable slope disabled.
Variable slope enabled (not available in local control).
Source selection (see Terms and abbreviations
page 152).
Defines the rate of the speed reference change when
variable slope is enabled by parameter
enable.
For the best result, enter the reference update interval into
this parameter.
Variable slope rate.
Displays speed correction term for the load share function
with a speed-controlled follower drive.
See section Load share function with a speed-controlled
follower (page 75).
This parameter is read-only.
Speed correction term.
With a speed-controlled follower, selects the source for
enabling/disabling the load share function.
See section Load share function with a speed-controlled
follower (page 75).
0 = Disabled
1 = Enabled
0.
1.
(23.29 Variable slope
(23.02 Speed
23.02 Speed ref ramp output
on
23.28 Variable slope
Def/FbEq16
Off
Time
0
1
-
50 ms
1 = 1 ms
-
See par.
46.01
Not selected
0
1