As a supplier of BECKHOFF Automation Software, I’ve witnessed firsthand the transformative power of custom user interfaces (UIs) in industrial automation. A well – crafted UI can significantly enhance operator efficiency, improve system reliability, and provide a more intuitive and engaging user experience. In this blog, I’ll guide you through the process of creating a custom user interface in BECKHOFF Automation Software. BECKHOFF Automation Software

Understanding the Basics of BECKHOFF Automation Software
BECKHOFF Automation Software offers a comprehensive suite of tools for industrial automation, including TwinCAT, a powerful automation software platform. TwinCAT combines PLC, NC, and robotics functionality with real – time operating system capabilities, making it a popular choice for a wide range of industrial applications. When it comes to creating a custom UI, TwinCAT provides several options, such as TwinCAT HMI (Human – Machine Interface) and TwinCAT 3 ScopeView.
TwinCAT HMI is a dedicated tool for developing web – based HMIs. It allows you to create interactive, dynamic, and responsive UIs that can be accessed from various devices, including desktop computers, tablets, and smartphones. TwinCAT 3 ScopeView, on the other hand, is mainly used for visualizing and analyzing process data in real – time. It can be integrated into the overall UI to provide in – depth insights into the system’s performance.
Defining the Requirements
The first step in creating a custom UI is to clearly define the requirements. This involves understanding the end – users, the tasks they need to perform, and the information they require. For example, if the UI is for a machine operator, the focus might be on providing quick access to machine controls, status indicators, and alarm notifications. If it’s for a supervisor, the UI may need to display more high – level information, such as production statistics and system performance metrics.
Conduct interviews with the end – users to gather their feedback and expectations. Observe their current work processes to identify pain points and areas where the UI can improve efficiency. Additionally, consider the technical requirements, such as the compatibility with different devices, the need for real – time data access, and the security requirements.
Designing the UI Layout
Once the requirements are defined, it’s time to start designing the UI layout. A well – designed layout should be intuitive, easy to navigate, and visually appealing. Begin by creating a wireframe, which is a rough sketch of the UI that shows the placement of different elements, such as buttons, labels, and graphs.
In BECKHOFF’s TwinCAT HMI, you can use a variety of built – in widgets and symbols to create the UI elements. These widgets are customizable, allowing you to change their appearance, behavior, and functionality. For example, you can use a button widget to trigger a specific action in the automation system, such as starting or stopping a machine. A label widget can be used to display text information, such as system status or parameter values.
When designing the layout, consider the principle of hierarchy. High – priority information should be prominently displayed, while less important information can be placed in secondary locations. Use consistent colors, fonts, and spacing throughout the UI to create a cohesive and professional look.
Implementing the UI with TwinCAT HMI
After the design is finalized, it’s time to implement the UI using TwinCAT HMI. The first step is to create a new HMI project in TwinCAT. You can define the target devices, such as the client devices that will access the UI, and the communication settings.
To add UI elements to the project, you can drag and drop widgets from the Widget Library onto the design surface. You can then customize the properties of each widget, such as its size, color, and text. For example, if you want to create a status indicator, you can choose a shape widget and set its fill color to change based on the system status.
TwinCAT HMI also supports the use of scripts to add interactivity to the UI. You can use JavaScript or TwinCAT’s own scripting language to define the behavior of the UI elements. For instance, you can write a script to update a graph in real – time based on the incoming data from the automation system.
Connecting the UI to the Automation System
One of the key aspects of creating a custom UI in BECKHOFF Automation Software is to connect it to the automation system. TwinCAT HMI provides seamless integration with TwinCAT PLCs and other automation components. You can establish a communication link between the HMI and the PLC using different protocols, such as ADS (Automation Device Specification).
In TwinCAT HMI, you can create a data connection to the PLC variables. This allows you to read and write data from and to the PLC directly from the UI. For example, if you have a temperature sensor connected to the PLC, you can display the temperature value on a label widget in the UI by establishing a data connection to the corresponding PLC variable.
It’s important to ensure the reliability and performance of the data connection. You can configure the communication settings, such as the update rate and the buffer size, to optimize the data transfer between the UI and the automation system.
Testing and Debugging
Before deploying the custom UI, it’s crucial to thoroughly test and debug it. Testing helps to identify and fix any issues, such as incorrect data display, unresponsive controls, or communication errors.
Start by testing the UI in a development environment. You can use TwinCAT’s built – in test tools to simulate the communication with the automation system and verify the behavior of the UI elements. Check for any error messages or warnings in the console output.
Perform user acceptance testing (UAT) with the end – users. This allows them to provide feedback on the usability and functionality of the UI. Based on their feedback, make any necessary adjustments to the UI design or implementation.
Deploying and Maintaining the UI
Once the testing is complete and the UI meets all the requirements, it’s time to deploy it. You can deploy the TwinCAT HMI project to a web server or a local device, depending on your deployment strategy. If you choose to deploy it to a web server, ensure that the server has the necessary security measures in place to protect the UI and the underlying automation system.
After deployment, you need to maintain the UI to ensure its continued performance and functionality. Monitor the system for any errors or issues, and apply software updates regularly. As the requirements of the automation system may change over time, be prepared to make modifications to the UI to accommodate these changes.
Conclusion

Creating a custom user interface in BECKHOFF Automation Software is a multi – step process that requires careful planning, design, implementation, testing, and maintenance. By following the guidelines outlined in this blog, you can create a UI that meets the specific needs of your industrial automation application, enhances operator efficiency, and improves the overall system performance.
BECKHOFF MX-System If you’re interested in learning more about creating custom UIs in BECKHOFF Automation Software or are considering a purchase, we’re here to help. Our team of experts has extensive experience in BECKHOFF software solutions and can provide you with the support and guidance you need. Feel free to reach out to us to start a discussion about your unique requirements and how our solutions can meet them.
References
- BECKHOFF Automation, “TwinCAT HMI Documentation”
- Engineering textbooks on industrial automation and human – machine interface design
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