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236 Parameters
Defines the droop rate in percent of the nominal motor speed.
Drooping decreases the drive speed slightly as the drive load
increases. The actual speed decrease at a certain operating
point depends on the droop rate setting and the drive load (=
torque reference / speed controller output). At 100% speed
controller output, drooping is at its nominal level, i.e. equal to
the value of this parameter. The drooping effect decreases
linearly to zero along with the decreasing load.
The droop rate can be used e.g. to adjust the load sharing in a
Master/Follower application run by several drives. In a
Master/Follower application the motor shafts are coupled to
each other.
The correct droop rate for a process must be found out case
by case in practice.
0.00%
0.00 … 100.00%
Droop rate.
100 = 1%
Selects the source for enabling/disabling speed controller
output balancing.
This function is used to generate a smooth, “bumpless”
transfer from a torque- or tension-controlled motor back to
being speed-controlled. When balancing is enabled, the
output of the speed controller is forced to the value of
.
Balancing is also possible in the ramp generator (see
parameter
).
0 = Disabled
1 = Enabled
Not selected
0.
1
Selected
1.
2
DI1
Digital input DI1 (
, bit 0).
2
DI2
Digital input DI2 (
, bit 1).
3
DI3
Digital input DI3 (
, bit 2).
4
DI4
Digital input DI4 (
, bit 3).
5
DI5
Digital input DI5 (
, bit 4).
6
No.
Name/Value
Description
Def
/
FbEq16
Motor speed in
% of nominal
100%
Speed decrease =
Speed controller output × Drooping × Nominal speed
Example:
Speed controller output is 50%, droop rate is 1%, nominal speed of the drive is
1500 rpm.
Speed decrease = 0.50 × 0.01 × 1500 rpm = 7.5 rpm.
100%
No drooping
Drooping
Speed controller
output / %
Drive load
Содержание ACS880-x04
Страница 1: ... ABB INDUSTRIAL DRIVES ACS880 primary control program Firmware manual ...
Страница 4: ......
Страница 18: ...18 Using the control panel ...
Страница 24: ...24 Control locations and operating modes ...
Страница 111: ...Application macros 111 Fieldbus control macro This application macro is not supported by the current firmware version ...
Страница 112: ...112 Application macros ...
Страница 496: ...496 Additional parameter data ...
Страница 544: ...544 Fault tracing ...
Страница 602: ...602 Control chain diagrams ...