![background image](http://html1.mh-extra.com/html/abb/acs880-x04/acs880-x04_firmware-manual_3389539044.webp)
44 Program features
The function is also available for scalar motor control with a frequency reference. The
input of the function is shown by
, the output by
.
Example
A fan has vibrations in the range of 540 to 690 rpm and 1380 to 1560 rpm. To make
the drive avoid these speed ranges,
• enable the critical speeds function by turning on bit 0 of parameter
, and
• set the critical speed ranges as in the figure below.
Settings
(page
)
• Critical frequencies: parameters
(page
).
Speed controller autotune
The speed controller of the drive can be automatically adjusted using the autotune
function. Autotuning is based on an estimation of the mechanical time constant
(inertia) of the motor and machine.
The autotune routine will run the motor through a series of acceleration/deceleration
cycles, the number of which can be adjusted by parameter
. Higher values will produce more accurate results, especially if the difference
between initial and maximum speeds is small.
The maximum torque reference used during autotuning will be the initial torque (ie.
torque when the routine is activated) plus
, unless limited
by the maximum torque limit (parameter group
) or the nominal motor torque
(
). The calculated maximum speed during the routine is the initial speed
(ie. speed when the routine is activated) +
, unless limited
or
540
690
1380
1560
1
Par.
2
Par.
3
Par.
4
Par.
1
2
3
4
(rpm)
(output of function)
(rpm)
(input of function)
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 ...