Operating Modes Of The Drive; Speed Control Mode - ABB ACS880 Firmware Manual

20 Control locations and operating modes

Operating modes of the drive

The drive can operate in several operating modes with different types of reference.
The mode is selectable for each control location (Local, EXT1 and EXT2) in
parameter group 19 Operation
The following is a general representation of the reference types and control chains.
The page numbers refer to detailed diagrams in chapter
Speed
reference
source selection
I
(page 288)
Torque
reference
source selection
and modification
(page 294)
Process PID
setpoint and
feedback source
selection
(page 300)
Process PID
controller
(page 301)
Frequency
reference
source selection
and modification
(page 298)


Speed control mode

The motor follows a speed reference given to the drive. This mode can be used either
with estimated speed used as feedback, or with an encoder or resolver for better
speed control accuracy.
mode.
Speed reference Speed reference
source selection ramping and
II
(page 289)
Control chain
Speed error
calculation
shaping
(page 292)
(page 290)
Speed controller
(page 293)
Reference
selection for
torque controller
(page 295)
Reference
modification for
torque controller
(page 296)
diagrams.
Motor feedback
configuration
(page 291)
Torque
controller
DTC motor
control mode
Scalar motor
control mode