Book Image

PLC and HMI Development with Siemens TIA Portal

By : Liam Bee
Book Image

PLC and HMI Development with Siemens TIA Portal

By: Liam Bee

Overview of this book

With automation requirements on the rise, Siemens’ TIA Portal development environment is almost a necessity for any automation engineer. The Totally Integrated Automation (TIA) environment helps seamlessly integrate all things automation, from PLC hardware and software design to HMI development. This book helps you understand the tools available in the TIA toolbox and shows you how to write code effectively. The book begins by introducing you to the TIA environment, covering the layout and tools available. Once you’ve got to grips with the environment, you’ll find out how to create hardware to write programs against, including adding IO modules and assigning memory for input and output. Next, you'll develop logic in all of the languages that TIA Portal offers, such as Ladder, Function Block Diagram, and Structured Text (SCL) (note that Statement List is not covered as a deprecated language), as well as the newest language, Cause and Effect (CEM). You’ll also discover how to store standard code in libraries, creating a version control system that is easy to manage and aids standard design. Finally, following the PLC design chapters, you’ll learn how to develop HMI applications in TIA Portal’s latest unified hardware. By the end of the book, you'll be well equipped to use all of the features that TIA Portal V17 offers.
Table of Contents (21 chapters)
1
Section 1 – The TIA Portal – Project Environment
5
Section 2 – TIA Portal – Languages, Structures, and Configurations
11
Section 3 – TIA Portal – HMI Development
16
Section 4 – TIA Portal – Deployment and Best Practices

Safeguarding outputs when in simulation mode

When any automation system is running in simulated mode, outputs should be protected and made safe so that when the simulation is running, they aren't processed.

This can be achieved with an output mapping layer. Much like the input mapping layer, if the simulation system is active, the output memory addresses are filled with data that ensures they are in a safe state:

Figure 7.26 – Setting outputs to a safe state when in simulation mode

Note

The preceding diagram shows how all the physical data, both input and output, can be stored in the asset's dedicated structured data block. Preparing output data in the asset's dataset is a good way of encapsulating the process data and segregating the input and output layers of the project.

This means that our Input Mapping Layer could be changed to a network protocol such as Modbus and our Output Mapping Layer could be changed to a remote...