Control Tasks; Parameters And Application Macros - ABB ACS580MV Hardware Manual

42 Control system and interfaces
For the related manuals refer to the project documentation, containing the relevant
Manuals and quick guides for I/O extension modules, fieldbus adapters, etc.

Control tasks


The BCU has specific control and closed-loop tasks assigned to it. It processes drive and
status information, performs the speed and torque control tasks, and monitors the
operation of the drive.
All relevant drive variables (e.g. speed, torque, current, voltage) are continuously
monitored by the control system. Pre-programmed protection functions ensure that these
variables remain within certain limits in order to maintain safe operation of the drive. These
internal functions are not programmable by the user.
Optionally, the drive can monitor signals from external equipment. These can be activated
and adjusted with parameters.
Other general control, protection and monitoring tasks regarding the whole drive include
control and monitoring of:
•
Main circuit breaker
The main circuit breaker (MCB) is an important switching and protection device of the
drive system. Therefore it must only be controlled by the drive.
•
Door locking system
•
Cooling fans

Parameters and application macros

The control system is configured, customized, and tuned with a set of application
parameters. The application parameters are organized in functional groups and have
factory-set default values (application macros).
The following application macros are available:
•
Factory (default application macro)
The Factory macro is suited to relatively straightforward speed control applications
such as fans, pumps and conveyors.
•
Hand/Auto
The Hand/Auto macro is suited to speed control applications where two external
control devices are used.
•
PID control
The PID control macro is suitable for process control applications, for example closed-
loop pressure, level or flow control systems.
•
Sequential control
The Sequential control macro is suited for speed control applications in which a speed
reference, multiple constant speeds, and two acceleration and deceleration ramps can
be used.
The default parameter values are adjusted during commissioning to the specific
application of the drive in order to activate the specific control, monitoring and protection
functions for the driven process, and to define the signals and data transferred between
drive and external equipment.