January 1, 2021

#21 - Creating a program on Safety CPU with TIA Portal and testing with the emulator PLCSIM

A trend that has been growing in industrial automation is the use of PLCs and Safety type IOs, which are usually identified by yellow or red color. The Safety Input cards are used to receive signals, coming from an emergency button, a laser curtain or a safety door for example, which are used in the PLC program to compute the logic and communicate the resulting actions to other devices, either by hardware via Safety Output cards or by network, with special protocols such as PROFISAFE.

A practical example is the use of E-Stops on a production line. When triggered, the goal is to safely switch off an engine. To reactivate the system, just reset the emergency button, press the global reset and then the button turns on. In this post we will show this implementation in TIA Portal and simulate with PLCSIM.

Program configuration using the existing blocks and libraries.

Testing with PLCSIM: Idle / Start / Stop / E-Stop Reset / Global reset

Safety Signatures, whether Software or Hardware can be seen in the Safety Administration:

An example project can be downloaded from the Siemens website.

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