Siemens SIMATIC S7 controller selection


Selecting a SIMATIC Controller for your Industrial Application

SIMATIC Controller Platform: Solutions for Small and Medium-Sized Applications

In the world of industrial automation, SIMATIC controllers play a key role in ensuring that systems operate reliably and efficiently. The SIMATIC controller platform, which includes the modular S7-1200 and ET 200 CPU-based controllers, offers a wide range of products to suit a variety of application needs.

Advantages of SIMATIC Modular Controllers

The modular nature of SIMATIC controllers makes them ideal for small and medium-sized industrial applications. Here are some of the key features that set these controllers apart:

1. Compact design

SIMATIC controllers are characterised by their compact design, which makes them ideal for installation in space-constrained areas.

2. high performance

Thanks to the fast execution time of bit operations, SIMATIC controllers ensure efficient operation even in dynamic industrial environments.

3. Resistance to environmental conditions

SIMATIC controllers offer various degrees of protection, including IP20 for the S7-1200 and IP65/67 for the ET 200, allowing them to be used in a wide variety of environmental conditions.

4. Long Service Life and Availability of Spare Parts

The manufacturer guarantees the availability of spare parts for at least 10 years after the end of production, which translates into the long-term reliability of systems based on SIMATIC controllers.

Product range

The SIMATIC controller platform includes a variety of models, providing flexibility in selecting the right solution for your application. Here are some of the key technical parameters:

1. S7-1200 controllers:

  • There are 3 compact CPUs and 3 standard CPUs.
  • High performance: the minimum execution time of a bit operation is 0.1 μs.
  • The main memory reaches up to 384 KB.

2. ET 200 controllers with CPU:

  • Various degrees of environmental resistance are available: IP65/67.
  • High input/output flexibility: maximum 2,048 bytes.

Functions and Capacities

SIMATIC controllers not only provide basic control functions, but also offer advanced capabilities such as:

  • Safety Functionality: Provides safety in industrial processes through fail-safe functions and redundancy.
  • HMI functionality: Integration with the user interface (HMI) enables easy and intuitive operation of the system.
  • Communication: SIMATIC controllers support various communication protocols, including PROFIBUS and PROFINET, providing versatility in integration with other devices.

SIMATIC modular controllers are a reliable solution for a wide variety of industrial applications. With their performance, robustness and advanced features, they provide a solid foundation for modern automation systems. Regardless of the specifics of your application, you will find the right SIMATIC controller to meet your requirements.

WinAC RTX: Modern Controller

WinAC RTX is a soft-PLC controller, ideal for PCs running Windows operating systems such as Windows XP, Windows Embedded Standard or Windows 7. It is the first real-time controller on the market with Fail-Safe functionality, compliant with SIL3, PL e and Cat. 4. WinAC RTX guarantees not only performance but also safety, making it the perfect choice for advanced industrial solutions.

SIMATIC Controller Family

The SIMATIC family of controllers offers a wide range of products, covering both software and hardware controllers. In addition to the WinAC RTX, PC-based controllers are also available in various versions and configurations. Whatever your needs, SIMATIC offers customised solutions for every customer.

IPC227D Bundles: Contemporary Solutions

For customers looking for comprehensive solutions, bundled kits such as the IPC227D Bundles are also available. These include a DIN rail-mounted Embedded PC with Windows Embedded, a software controller and an HMI. This provides the customer with a turnkey solution, ready for immediate implementation.

Performance and Memory

Performance and memory capacity are key factors when choosing a controller. WinAC RTX offers impressive bit rate performance, minimising system response time. In addition, the available memory options, including on-chip and persistent memory, allow for efficient data management, regardless of the size of the project.

Technological features

SIMATIC controllers not only offer basic functions, but also advanced technological capabilities. Loadable function blocks, technology CPUs or isochronous mode are just some of the features that will make process control even more efficient.

HMI and PC functionality

Integrating the controller with an HMI and PC is the key to easy process management and monitoring. Thanks to the integrated HMI functions and the ability to integrate with various programming languages, users have full control over their systems.

Communication and Extensibility

SIMATIC controllers provide extensive communication options, including via MPI, PROFIBUS or PROFINET interfaces. In addition, expandability options allow the system to be expanded according to current needs, guaranteeing flexibility and scalability.


Choosing the right controller is a key element in ensuring the efficiency and reliability of industrial processes. With SIMATIC solutions, companies can be confident that their control systems are fully fit for purpose, both now and in the future.

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SIMATIC S7 in action

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Author of entries
Tomasz Gilewski

Hello, my name is Tomasz Gilewski. I am the author of books on the S7-1200 controller and HMI panels (i.e. Siemens hardware). I have been programming exclusively on Siemens hardware and engineering tools for several years.

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