ABB ACS860, Firmware Manual

Page: 162 / 438

162 Parameters
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 92 ). -
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
24
24 Speed reference
conditioning Speed error calculation; speed error window control
configuration; speed error step.
See the control chain diagrams on pages
425 and 426 .
24.01 Used speed
reference Displays the ramped and corrected speed reference (before
speed error calculation). See the control chain diagram on
page
425 .
This parameter is read-only.
-
-6000.00 …
6000.00 rpm Speed reference used for speed error calculation. See par.
46.01
24.02 Used speed
feedback Displays the speed feedback used for speed error calculation.
See the control chain diagram on page
425 .
This parameter is read-only.
-
-6000.00 …
6000.00 rpm Speed feedback used for speed error calculation. See par.
46.01
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