SIEMENS
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Siemens D 21.4 · 2017
SINAMICS S120 drive system
Control Units
7
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Overview
System architecture with a central Control Unit
Electronically coordinated individual drives work together to per-
form your drive tasks. Higher-level controllers operate the drives
to achieve the required coordinated movement. This requires
cyclic data exchange between the controller and the drives. This
exchange usually took place via a field bus, which required a
great deal of time and effort for installation and configuration.
SINAMICS S120 takes a different approach: A central Control
Unit controls the drives for all connected axes and also estab-
lishes the technological links between the drives and/or axes.
Since all the required data is stored in the central Control Unit, it
does not need to be transferred. Inter-axis connections can be
established within a Control Unit and easily configured in the
STARTER commissioning tool using a mouse.
•
Simple technological tasks can be carried out automatically
by the SINAMICS S120 Control Unit
• The
CU310-2 DP
or
CU310-2 PN
Control Unit is available for
single drives.
• The
CU320-2 DP
or
CU320-2 PN
Control Unit is suitable for
multi-axis applications
•
Sophisticated Motion Control tasks can be implemented with
the support of the more powerful
D410-2, D425-2, D435-2,
D445-2
and
D455-2
Control Units of SIMOTION D (graded
according to performance)
You can obtain further information about SIMOTION in the
Industry Mall and Catalog PM 21.
Each of these Control Units is based on an object-oriented
SINAMICS S120 standard firmware that contains all of the most
popular control modes and can be scaled to meet even the
highest performance requirements.
The drive controls are supplied as ready-to-configure drive
objects:
•
Infeed Control for line infeed
•
Vector Control
- Variable-speed drives with high speed and torque stability
in general machine and plant construction
- Particularly suitable for induction motors
- Optimized pulse patterns for efficient motor/converter
systems
•
Servo Control
- Drives with highly dynamic motion control
- Angular synchronism with isochronous
PROFIBUS/PROFINET
- For use in machine tools and clocked production machines
The most commonly used v/f control modes are stored in the
"Vector control" drive object and are ideal for implementing even
simple applications such as group drives with SIEMOSYN
motors.
CompactFlash card
The functions of the SINAMICS S120 drives are stored on a
CompactFlash card. This card contains the firmware and para-
meter settings for all drives in the form of a project. The
CompactFlash card can also hold additional projects, which
means that the correct project can be accessed immediately
when series machines of different types are commissioned.
When the Control Unit has booted, the data on the
CompactFlash card is read and loaded to the RAM.
The firmware is organized in objects. Drive objects are used to
implement open-loop and closed-loop control functions for Line
Modules, Motor Modules, Power Modules and other system
components connected by DRIVE-CLiQ.
Drive objects
A drive object is a self-contained software function with its own
parameters and, if necessary, its own fault messages and
alarms.
G_D211_EN_00057a
Infeed
control
Drive
control
Drive
control
Terminal
Module
evaluation
Terminal
Module
evaluation
Option
Board
evaluation
On-board
I/O
evaluation
Drive objects
Control Unit
Terminal
Module
Terminal
Module
Motor
Module
Motor
Module
Line
Module
Option
Board
...
...
© Siemens AG 2017