ABB ACS880 - Page 276

Def / Type
FbEq 16b / 32b
DescriptionName / Range /
Selection
No.
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 enable23.28
0Variable slope disabled.Off
1Variable slope enabled (not available in local control).On
See Terms and abbreviations (page 132).
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 36).
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
Not selected / uint32With a speed-controlled follower, selects the source for
enabling/disabling the load share function.
See section Load share function with a speed-controlled
follower (page 36).
0 = Disabled
1 = Enabled
Follower speed
correction enable
23.40
276 Parameters