ACS2000 User manual 2UEA001270 Rev. F 3-7 (26)
Chapter 3 - Control system
Switching of the semiconductors in the INU is directly controlled in 
accordance with the motor flux and torque.
The measured motor currents and DC link voltages are inputs to an 
adaptive motor model. The model produces estimated 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.
3.2.1.5 Peripheral I/O devices
The peripheral input and output devices connected to the AMC circuit 
board of the INU include:
3.2.2 Local control panel
The local control panel on the control compartment door serves as the 
basic user interface for monitoring, control and operation of the drive and 
setting of parameters. 
Local CDP control panel (see section 3.2.2 and Chapter 9 - CDP 
control panel)
IOEC I/O system for 
parallel signal transfer to 
external devices
(see section 3.3)
Optional fieldbus 
adapters for data transfer 
to a higher-level control 
system
(see section 3.3.4)
Pulse encoder (see section 3.3.5)
Motor temperature 
supervision
(see section 3.3.6)
PC-based service tools: DriveWare
®
 software tools - includes 
software tools such as the commissioning 
and maintenance tools DriveWindow and 
DriveDebug, and DriveOPC for data 
transfer between ABB drives and 
Windows
®
-based applications.
DriveMonitor
TM
 (Option) - a monitoring and 
diagnostics tool that allows access to the 
drive from any location in the world via a 
secure internet connection.