ABB ACS880 - Page 316

Def / Type
FbEq 16b / 32b
DescriptionName / Range /
Selection
No.
- / -Speed ramp balancing reference. For scaling, see
parameter 46.1.
-30000.00 ...
30000.00 rpm
Off / uint32Activates 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 (23.2 Speed ref ramp output) is a straight
line.
Speed reference
Time
Speed
reference
23.02 Speed ref ramp output
A
t
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
enable
23.28
0Variable slope disabled.Off
1Variable slope enabled (not available in local control).On
See Terms and abbreviations (page 169).Other [bit]
50 ms / real32Defines 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.
Variable slope rate23.29
1 = 1 ms / 1 = 1 msVariable slope rate.2...30000 ms
- / real32Displays 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.
Follower speed
correction out
23.39
- / -Speed correction term. For scaling, see parameter 46.1.-30000.00 ...
30000.00 rpm
316 Parameters