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Beckhoff: TwinCAT 2 (TX1100 Series)
Beckhoff: TwinCAT 2 (TX1100 Series)
 
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Beckhoff: TwinCAT 2 (TX1100 Series)


The Windows Control and Automation Technology

The Beckhoff TwinCAT software system turns almost any compatible PC into a real-time controller with a multi-PLC system, NC axis control, programming environment and operating station. TwinCAT replaces conventional PLC and NC/CNC controllers as well as operating devices with:

  • open, compatible PC hardware

  • embedded IEC 61131-3 software PLC, software NC and software CNC in Windows NT/2000/XP/Vista, Windows 7, NT/ XP Embedded, CE

  • programming and run-time systems optionally together on one PC or separated

  • connection to all common fieldbuses

  • PC interfaces support

  • data communication with user interfaces and other programs by means of open Microsoft standards (OPC, OCX, DLL, etc.)

TwinCAT architecture

TwinCAT consists of run-time systems that execute control programs in real-time and the development environments for programming, diagnostics and configuration. Any Windows programs, for instance visualization programs or Office programs, can access TwinCAT data via Microsoft interfaces, or can execute commands.

A practically oriented software solution

TwinCAT offers a precise time base in which programs are executed with the highest deterministic features, independently of other processor tasks. The real-time load on a PC is set with TwinCAT; defined operating behavior is achieved in this way. TwinCAT indicates the system load for programs that are running. A load threshold can be set in order to assure a defined computing capacity for the operating programs as well as for Windows NT/2000/XP/Vista or Windows 7. If this threshold is exceeded, a system message is generated.

TwinCAT supports system diagnosis

The general use of hardware and software from the open PC world requires some checking: Unsuitable components can upset the PC system. Beckhoff has integrated a practical indicator of the real-time jitter, giving administrators an easy way to evaluate the hardware and software. A system message during operation can draw attention to incorrect states.

Start/stop behavior

Depending on the setting, TwinCAT is started and stopped manually or automatically. Since TwinCAT is integrated into Windows NT/2000/XP/Vista and Windows 7 as a service, an operator is not needed to start the system: switching on is enough.

Restarting and data backup

When a program is started or restarted, TwinCAT loads programs and remanent data. To backup data and to shut down Windows NT/2000/XP/Vista and Windows 7 correctly, a UPS (uninterruptible power supply) is of great value.

TwinCAT and “Blue Screen”

The TwinCAT system can be configured such that real-time capability is maintained in the event of a BSOD (Blue Screen of Death) operating system crash. Real-time tasks such as PLC and NC can therefore continue to run and bring the controlled process into a safe state. Ultimately, it is the decision of the programmer whether or not to utilize this feature, bearing in mind that data or programs may already have been destroyed by the BSOD.

World-wide connection through message routing – “remote” connection is inherent to the system

According to the requirement for operating resources, the TwinCAT software devices can be distributed: TwinCAT PLC programs can run on the PCs or on Beckhoff Bus Terminal Controllers. A “message router” manages and distributes all the messages, both in the system and via TCP/IP connections. PC systems can be connected with each other via TCP/IP; Bus Terminal Controllers are integrated via serial interfaces and fieldbuses (EtherCAT, Lightbus, PROFIBUS DP, CANopen, RS232, RS485, Ethernet TCP/IP).

World-wide access

Since standard TCP/IP services of NT/2000/XP/Vista/CE and Windows 7 can be used, this data can be exchanged across the world. The system offers scalable communication capacity and timeout periods for the supervision of communications. OPC provides a standardized means for accessing many different SCADA/MES/ERP packets.


TX1100 | TwinCAT I/O


TwinCAT I/O

TwinCAT I/O is a real-time driver for Windows programs running under Windows NT/2000/XP/Vista/CE or Windows 7. Program variables, the I/O devices present in the system and the connected I/O channels are brought into the proper relationship with one another.

TwinCAT I/O

  • provides variable-oriented linkage of I/O devices and tasks

  • provides variable-oriented linkage of tasks to other tasks

  • The smallest unit is one bit.

  • supports both synchronous and asynchronous relationships

  • Data regions and process images are exchanged consistently.

Openness: all standards

TwinCAT I/O supports all established fieldbuses – even simultaneously.

  • EtherCAT

  • Lightbus

  • PROFIBUS DP (master and slave)

  • PROFIBUS MC (Motion Control)

  • Interbus

  • CANopen

  • SERCOS interface

  • DeviceNet

  • Ethernet

  • PC printer port

  • USB

  • serial Bus Coupler BK8100 to COM

  • memory interface (DPRAM) for PC cards

  • SMB (System Management Bus)

TwinCAT I/O – properties

TwinCAT I/O provides the connected I/O channels as a structure and organizes the mapping of the data transfer.

TwinCAT I/O permits server process images to be linked bit-wise to I/O channels and provides tools which can, for instance, link a lot of channels continuously with a single command. The connections can be moved by drag and drop.

Software wiring

With the aid of the TwinCAT I/O system, the inputs and outputs of a task can be cyclically exchanged with the outputs and inputs of another task – the data consistency remains intact. The TwinCAT I/O system is variable-oriented, which means that the smallest unit which can be addressed and linked is a variable, and the smallest size of a variable is one bit.

Online analysis

At the server’s fieldbus level and the level of the process image, commissioning and servicing are assisted by online display. TwinCAT I/O generates address relationships (mappings) between tasks and I/O devices, and provides powerful online tools:

  • online display in a directory tree

  • online watch window

  • force and write to commission and test task variables and I/O devices

Diagnostic data is displayed in a consistent form for all I/O devices.

Import/export functions

TwinCAT I/O manages variables, making import and export functions available at all levels.

TcTimer API under CE

On Beckhoff CE devices TwinCAT I/O is available with the TcTimer extension. The TcTimer API offers a real-time timer (scalable from 100 µs) and access to the logical process image. Data exchange with the fieldbus is triggered with a method call. The TcTimer API enables external applications to create deterministic applications that are synchronized up to the IO fieldbus level.


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