ABB ACS880 ESP, Firmware Manual

Page: 209 / 494

Parameters 209
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 101 ).
-
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
Motor control (page 57 ).
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
Motor control (page 57 ).
0 = Disabled
1 = Enabled
Not selected
Not selected 0. 0
Selected 1. 1
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