SIEMENS SIMATIC TDC control system|TDC multiprocessor control system

SIMATIC control systems

SIMATIC TDC and FM 458-1 DP are SIMATIC control systems and cover the top performance range. Their application area comprises

  • Extremely fast response, computing and/or
  • Closed-loop control with maximum precision (minimum sampling time: 100 µs)

SIMATIC control systems are freely configurable with STEP 7 and the engineering tools CFC and SFC. Configuring requires the block library of the D7-SYS add-on package.

FM 458-1 DP application module

The FM458-1 DP application module enables high-speed calculation and control in the S7-400 system:

  • Rapid I/O access by using expansion modules
  • Isochronous PROFIBUS DP interface onboard

The multi-processor automation system SIMATIC TDC (Rack Based) has been specially designed for complex closed-loop control and computing tasks in plant construction and offers computing power almost without limits.

SIMATIC TDC multiprocessor control system

SIMATIC TDC (Technology and Drives Control) is a digital automation system featuring very high computing power and the ability to process very large programs. An extensive library with approx. 300 ready-made function blocks is available for fast engineering.

BenefitsSIMATIC TDC multiprocessor control system

  • SIMATIC TDC provides the highest degree of competence when it comes to motion control and closed-loop control technology.
  • SIMATIC TDC especially distinguishes itself as an effective, synchronizable multi-processing system.


SIMATIC TDC is used, in particular, in plant engineering, the metallurgy and rolling mill technology industries as well as in the energy distribution sector.


The system is of a modular design and can, depending on the particular application, be equipped with the necessary computational/arithmetic performance as well as digital, analog, incremental and absolute value encoder connections or communication interfaces.

All of the modules in the SIMATIC TDC subracks are connected through a high-performance 64-bit backplane bus. This allows data to be exchanged between all of the modules, almost in the processor clock cycle.


Free graphic configuring

SIMATIC TDC is configured with the Windows-based graphical SIMATIC tools STEP 7, CFC and optionally SFC. The software package D7-SYS supplements the CFC engineering tool with the function blocks for SIMATIC TDC as well as the high-performance operating system.


For complex automation tasks, it may be necessary exchange data between CPUs in several racks. For this purpose, a GlobalDataMemory (GDM) can be used as a central memory for coupling a maximum of 44 racks.

Via this memory, data can be exchanged across racks between all CPUs in the system. This means that more than 800 CPUs can be used in a system.

GDM consists of a rack in which only GDM modules can be inserted. It can thus be operated in a special, particularly fast mode.

Service and commissioning

Service and commissioning are performed directly from the graphic configuration interface STEP 7 and CFC.

Programs of other processor modules

CFCs for the SIMADYN D modules PM5, PM6, for the FM 458-1 DP application module, or for the technology module T400 can be transferred very easily to the CPUs of the automation system SIMATIC TDC.


Drives and distributed I/O are linked to SIMATIC TDC using PROFIBUS DP interface modules with master and / or slave function.

Multiple SIMATIC stations, as well as external systems and host computers, can be networked using a TCP/IP interface modules for up to 100 Mbit/s. Visualization components such as WinCC can also be linked via this interface module.

All the visualization components of SIMATIC HMI, such as WinCC or OP/TD panels are also linked via the MPI (multi point interface).