Allen-Bradley PLC Programming Software

Over the years, Allen-Bradley, a brand under Rockwell Automation, has introduced a range of software solutions for programming its PLCs. These include RSLogix 5, RSLogix 500, RSLogix 5000, Studio 5000, and Connected Components Workbench. These tools provide various PLC programming options, including ladder logic, structured text, sequential function charts, and function blocks. While each language has its pros and cons, ladder logic remains the most widely used due to its alignment with traditional electrical design principles in industrial settings.

In this article, we’ll explore the key features of RSLogix 500, RSLogix 5000, and Studio 5000 software, highlighting their differences and unique capabilities. Whether you’re new to PLC programming or looking to expand your skills, we’ll also provide tips on selecting the right software to suit your needs and career goals.

Let’s begin with RSLogix 500.

RSLogix 500: For SLC and MicroLogix

RSLogix 500 is specifically designed for older Allen-Bradley PLCs, such as the SLC and MicroLogix series. While these PLCs are still in operation in many facilities, they are gradually being phased out. RSLogix 500 provides the essential tools to program and maintain these legacy systems, including ladder diagram programming, online program monitoring, and basic troubleshooting features.

However, as an older software, RSLogix 500 lacks modern capabilities like tag-based programming, modular development using Add-On Instructions, and support for IEC 61131-3 programming languages such as structured text and function block diagrams. Its primary role today is in maintaining older automation systems, but as these systems are updated, RSLogix 500’s relevance will decline.

Next, let’s move on to RSLogix 5000.

RSLogix 5000: For CompactLogix and ControlLogix

RSLogix 5000 marked a significant leap forward in Allen-Bradley’s programming environments. Designed for the CompactLogix and ControlLogix PLCs (up to firmware version 20), it introduced tag-based programming, support for all IEC 61131-3 languages, and modular coding with Add-On Instructions. These features made it far more versatile and powerful than RSLogix 500.

This software was developed for controlling more complex machines and processes, making it ideal for larger industrial systems. Despite its advanced features, RSLogix 5000 has since been replaced by Studio 5000 Logix Designer as the primary programming tool for newer PLC models.

Let’s take a look at Studio 5000 Logix Designer

Studio 5000: The Latest in PLC Programming

Studio 5000 Logix Designer is the latest programming environment for Allen-Bradley CompactLogix and ControlLogix PLCs running firmware version 21 and higher. While it builds on RSLogix 5000, it includes several enhancements, such as downloadable comments and tag descriptions, extended tag properties, and support for modern hardware like Flex5000 I/O.

For new projects, Studio 5000 is the recommended software due to its advanced capabilities and ongoing updates. However, for maintaining older systems, RSLogix 500 or RSLogix 5000 might still be required, depending on the specific PLCs in use.

This brings us to an important question: which software should you focus on learning?

Which PLC Programming Software Should You Learn?

• Studio 5000 Logix Designer is ideal if you aim to work on modern systems, as it is widely used for new projects and offers the most advanced features. However, its license cost can be prohibitive.
• Connected Components Workbench is a great alternative for beginners, especially since it’s free and includes a built-in simulator. This software is designed for Micro800 PLCs, which are replacing older MicroLogix models.
• RSLogix 500 is best learned if you’re maintaining legacy systems that still use SLC or MicroLogix PLCs. It’s practical for extending or troubleshooting existing setups but not suited for new projects.

By understanding the strengths and use cases of each software, you can make an informed decision and develop skills that align with your career goals in industrial automation. For a detailed guide on how to use the PLC programming software versions discussed, check out this tutorial by SolisPLC.