ABB ACS880 Firmware Manual page 316

316 Parameters
No. Name / Range /
Selection
-30000.00 ...
30000.00 rpm
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
Description
Speed ramp balancing reference. For scaling, see
parameter 46.1.
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
Variable slope rate) are equal, the resulting speed
reference (23.2 Speed ref ramp
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).
See Terms and abbreviations (page
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 Load share function with a speed-controlled
follower (page 74).
This parameter is read-only.
Speed correction term. For scaling, see parameter 46.1.
(23.29
output) is a straight
23.02 Speed ref ramp output
169).
23.28 Variable
Def / Type
FbEq 16b / 32b
- / -
Off / uint32
Time
0
1
50 ms / real32
1 = 1 ms / 1 = 1 ms
- / real32
- / -