ABB ACS880 PCP Firmware Manual page 209

Control program
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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
Speed 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 101).
Defines the rate of the speed reference change when
variable slope is enabled by parameter
slope
enable.
For the best result, enter the reference update interval into
this parameter.
Variable slope rate.
Displays the speed correction term for the load share
function with a speed-controlled follower drive.
See section
Motor control
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
Motor control
0 = Disabled
1 = Enabled
0.
1.
(23.29 Variable slope
(23.02
23.02 Speed ref ramp output
Time
on
23.28 Variable
(page 57).
(page 57).
Parameters 209
Def/
FbEq16
Off
0
1
-
50 ms
1 = 1 ms
-
See par.
46.01
Not selected
0
1

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