TX1100 | TwinCAT I/O

TX1100 | TwinCAT I/O


TwinCAT I/O is a real-time driver for Windows programs. 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.


  • 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)
TX1100 | TwinCAT I/O | Open I/O interface

Open I/O interface

TX1100 | TwinCAT I/O | Online display

Online display


TwinCAT I/O provides the connected I/O channels as a structure and organises 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 synchronised up to the IO fieldbus level.

TX1100 | TwinCAT I/O | Import/export functions

Import/export functions

TX1100 | TwinCAT I/O | I/O configuration

I/O configuration

Technical dataTX1100 | TwinCAT I/O
PC hardwarestandard PC/IPC hardware, no extras
Operating systemsversion-dependent: Windows 7/10, Windows CE
Real-timeBeckhoff real-time kernel as a component of TwinCAT
User programUser program running in user mode which can, for instance, run cyclically as a multimedia task (“soft” real-time). Access to the I/O process image is provided via cyclical calls of DLL functions.
Under CE: hard real-time with synchronised access to process image
Memoryonly limited by the size of the computer’s RAM
Cycle time50 µs upwards selectable
Programmingapplication program in any high-level language, e.g. C++, Delphi
Debuggingvia the standard debugging tools of the high-level language used
I/O systemfree choice of fieldbus: EtherCAT, PROFIBUS DP/MC, CANopen, DeviceNet, Interbus, SERCOS, Lightbus, Ethernet (printer port, COM port, USB), PC cards: generic memory DPRAM support
Connectivityvariable access via OPC, Beckhoff ADS OCX/DLL (Automation Device Specification)
(under CE: in addition TcTimer API)
Ordering information
TX1100license for using the I/O DLL for data exchange with Windows programs


TwinCAT I/O, quantity scale 1-4..

199.20€ Be PVM: 164.63€



TwinCAT I/O, quantity scale 5-9..

149.41€ Be PVM: 123.48€



TwinCAT I/O, quantity scale 10-24..

113.84€ Be PVM: 94.08€



TwinCAT I/O, quantity scale 25-49..

85.38€ Be PVM: 70.56€



TwinCAT I/O, quantity scale 50-99..

64.03€ Be PVM: 52.92€

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