CONTROL SYSTEM
PRODUCT
ACS1000W
DOCUMENT KIND
User manual
DOCUMENT ID.
3BHS213400 E01
REV.
J
LANG.
en
PAGE
The measured motor currents and DC link voltages are inputs to an adaptive motor
model. The model produces exact values of torque and flux every 25 microseconds.
Motor torque and flux comparators compare the actual values to reference values
which are produced by the torque and flux reference controllers.
Depending on the outputs from the hysteresis controllers, the switching logic
directly determines the optimum switch positions every 50 microseconds and
initiates switching whenever required.
4.2.2.5. Peripheral I/O devices
The peripheral input and output devices connected to the AMC circuit board
include:
–
Local CDP control panel
–
IOEC I/O modules for parallel signal transfer to external devices (see
Section 4.3.1 IOEC I/O modules
–
Serial communication interface (fieldbus) for serial data transfer to a higher-
level control system (see
Section 4.3.2 Serial communication interface (fieldbus)
–
Pulse encoder interface NTAC (option) (see
Section 4.3.3 Pulse encoder interface
)
–
PC-based service tools comprising:
•
DriveWare® software tools, commissioning and maintenance tools, ie,
DriveWindow and DriveDebug, and DriveOPC for data transfer between
ABB drives and Windows®-based applications.
•
NETA-21 with ABB Ability monitoring contract (optional): monitoring and
diagnostics tool that allows access to the drive from any location in the
world via a secure Internet connection.
4.2.2.6. Control modes
The drive provides the following control modes:
–
Speed control mode:
Default control mode of the drive. The control mode can
be used for applications where constant speed is required, such as pumps,
fans and conveyors.
–
Torque control mode:
used for processes that require torque control (eg,
mixers and slave drives). The torque reference comes from a process control
system or a control panel.
–
PID control mode:
controls the process variable (eg, pressure, level or flow) by
adjusting the speed of the motor accordingly.
