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SIMATIC Controller Selection Guide

This selection guide helps to find the right SIMATIC Controller based on your requirements so you can identify your perfect controller type.

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Which SIMATIC controller fits your application?

SIMATIC Controllers stand for maximum reliability, scalability, and future-proof performance in industrial automation. Every CPU is also available as a fail-safe version for safety-related applications and complies with the latest cybersecurity standards. Thanks to seamless integration into the Totally Integrated Automation Portal (TIA Portal), you benefit from efficient engineering, simulation, diagnostics, and maintenance – all within a unified environment.

Use our guide to choose the right controller for your application.

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1. Installation Environment

Where do you want to install your controller? Find the right solution for every installation enviroment.

Central installation in the control cabinet (IP20)

The controller is installed centrally in the control cabinet. Ideal for classic machine concepts with protected environments and centralized wiring.

Decentralized, space-saving installation (IP20)

The controller is installed decentrally but still within the control cabinet environment. Suitable for compact machine concepts with limited space and modular design.

Decentralized, outside the control cabinet (IP65/67)

The controller is installed outside the traditional control cabinet, close to the machine. Ideal for robust decentralized automation concepts directly in the field.

2. Performance and Application Size

What kind of performance does your application require?

Compact machines and standard applications

For simple to mid‑range automation tasks (~up to 200 central I/Os) requiring a compact design, integrated functionality, and cost‑efficient engineering.

High-end performance for complex tasks

For demanding applications involving large quantity structures, complex processes, or advanced technological requirements.

3. Programming Languages

What programming languages should it support?

FBD / LAD / SCL

Support for core programming languages in TIA Portal. Suitable for classic automation tasks using Function Block Diagram (FBD), Ladder Diagram (LAD), or Structured Control Language (SCL).

STL / GRAPH support

In addition to FBD, LAD, and SCL, STL and GRAPH are also supported. Suitable for applications with sequential processes or existing STL code.

Support for high-level languages

Additional support for high-level languages to implement complex automation tasks and specialized algorithms in industrial applications.

4. Motion Control Functions

Which motion control functions do you require?

Standard Motion Control

For basic motion functions such as speed control, positioning, cam functions, measuring probes, and gear synchronization. Ideal for standard motion tasks in typical machines and classic automation systems.

Extended Motion Control

For extended motion applications, including camming or simple kinematics with up to 4 motion axis. Suitable for machines requiring more complex motion sequences.

Advanced Motion Control

For demanding motion control tasks involving cross‑CPU synchronization or advanced kinematics with up to 6 motion axis kinematics. Ideal for highly dynamic machines and complex, precision‑driven motion applications.

5. Controller Architecture

Do you want to use hardware- or software-based control?

Hardware PLC (dedicated controller)

Classic automation using a dedicated hardware PLC. The control system runs on specially developed controller hardware and provides high reliability, performance, and industrial robustness.

Drive-integrated hardware PLC

The control functions are integrated directly into the drive. Suitable for compact machine concepts with reduced hardware and tight integration of motion and control functions.

Software PLC (PC-based)

The control system runs as software on an industrial PC. Suitable for flexible automation concepts with high computing performance and integration of IT and automation functions.