ABB ACS880-x04, Firmware Manual

Page: 225 / 604

Parameters 225
23.28 Variable slope
enable 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 (
23.29 Variable slope rate )
are equal, the resulting speed reference ( 23.02 Speed ref
ramp output ) is a straight line.
This function is only active in remote control.
Off
Off Variable slope disabled. 0
On Variable slope enabled (not available in local control). 1
Other [bit] Source selection (see Terms and abbreviations on page 114 ). -
23.29 Variable slope rate Defines the rate of the speed reference change when variable
slope is enabled by parameter
23.28 Variable slope enable .
For the best result, enter the reference update interval into
this parameter.
50 ms
2…30000 ms Variable slope rate. 1 = 1 ms
23.39 Follower speed
correction out Displays the 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 32 ).
This parameter is read-only.
-
-30000.00 …
30000.00 rpm Speed correction term. See par.
46.01
23.40 Follower speed
correction enable 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 32 ).
0 = Disabled
1 = Enabled
Not selected
Not selected 0. 0
Selected 1. 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
No. Name/Value Description Def / FbEq16
t
Speed
reference
23.02 Speed ref ramp output
Speed reference
Time
A
t = update interval of signal from external control system
A = speed reference change during t