CU310-2 PN Control Unit

CU320-2 PN Control Unit

System architecture with a central Control Unit

In multi-axis drives, the individual drives are controlled from the higher-level control systems in such a way as to achieve the desired coordinated movement. This requires cyclic data exchange between the controller and the drives. A central Control Unit controls the drives for all connected axes and also establishes 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.

• The SINAMICS control module can handle simple technological tasks by itself
• The CU320?2 DP or CU320?2 PN Control Units are used in conjunction with all Motor Modules or Line Modules for single or multi-motor drives. The CU310?2 DP or CU310?2 PN Control Units are used together with the Power Modules and single-motor drives.
• Sophisticated motion control tasks can be implemented with the support of the more powerful D410?2, D425?2, D435?2, and D445?2 Control Units of SIMOTION D (graded according to performance). Refer to Catalog PM 21 for information about SIMOTION.

Each Control Unit is based on an object-oriented SINAMICS standard firmware, which contains all common control modes and can be scaled to meet even the most advanced performance requirements.

The drive controls are supplied as ready-to-configure drive objects:

• Infeed Control for mains infeed
• Vector control
  • Speed-controlled 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-locked 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.

Overview of key open-loop and closed-loop control functions

Drive objects

A drive object is a self-contained software function with its own parameters and, where appropriate, its own fault messages and alarms.

Comprehensive package of open-loop and closed-loop control functions

A wide variety of standard functions such as setpoint input, data set changeover, controller optimization, kinetic buffering, etc. ensure a high degree of functional reliability and excellent flexibility when addressing the application.

BICO technology

Every drive object contains a large number of input and output variables which can be freely and independently interconnected using Binector Connector Technology (BICO). A binector is a logic signal which can assume the value 0 or 1. A connector is a numerical value, e.g. the actual speed or current setpoint.

Drive Control Chart (DCC)

Drive Control Chart (DCC) for SINAMICS S120 is a user-friendly tool with which drive-related closed-loop control, logic and arithmetic functions can be configured in graphical form. It extends the possibility of configuring technological functions for SINAMICS drives in an extremely easy way.

The user-friendly DCC editor enables easy graphics-based configuration, allows control loop structures to be clearly represented and provides a high degree of reusability of charts that have already been created.

The associated block library (DCB library) contains a large selection of closed-loop control, calculation and logic modules (Drive Control Blocks (DCB)) as well as more complex open-loop and closed-loop control functions.

Two types of DCB library are available, i.e. DCB Standard and DCB Extension. The DCB standard library is supplied as standard with the SINAMICS DCC software.

DCC is an add-on for the STARTER commissioning tool.

CompactFlash card

The functions of the drives are stored on a CompactFlash card. This card contains the firmware and parameter 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.

Integral safety functions (Safety Integrated)

The Control Units support comprehensive safety functions.

The integrated safety functions are the Safety Integrated Basic functions

• STO = Safe Torque Off
• SBC = Safe Brake Control
• SS1 = Safe Stop 1 (Time controlled)

and the Safety Integrated Extended functions that require a license

• SS1 = Safe Stop 1 (time and acceleration controlled)
• SS2 = Safe Stop 2
• SOS = Safe Operating Stop
• SLS = Safely-Limited Speed
• SSM = Safe Speed Monitor
• SDI = Safe Direction
• SLP = Safely-Limited Position
• SP = Safe Position transmission
• SBT = Safe Brake Test

If the integrated safety functions are used, licenses, supplementary system components such as TM54F Terminal Modules, or suitable safety controls will be necessary.

Diagnostics optimally supported by trace function

The time characteristics of input and output variables associated with drive objects can be measured by the integrated trace function and displayed using the STARTER commissioning tool. Several signals can be simultaneously traced. A recording can be triggered dependent on freely selectable boundary conditions, e.g. the value of an input or output variable.