Not all PLCs are built the same, and if you’re running automation in Perth, the two names you’ll come across most are Allen Bradley and Siemens. Both have a solid reputation, but they work quite differently behind the scenes. From the way they’re programmed to how they scale and integrate with other systems, the choice can shape your entire setup.
Here’s what you need to know to figure out which system suits your operation best.
Software & Programming Environment
Allen Bradley uses Studio 5000, a widely respected platform that supports multiple programming languages but is particularly friendly to those familiar with Ladder Logic. It’s intuitive, easy to learn, and ideal for quick deployment, making it a favourite in North America and among technicians looking for a straightforward user interface.
Siemens, meanwhile, uses TIA Portal, which supports multiple programming languages, including Ladder Logic, Function Block Diagram, and Structured Text. It’s more complex but allows for deeper configuration and flexibility. Teams that have skilled programmers or large-scale automation goals, Siemens provides more advanced tools under one platform, including PLC, HMI,VSD and SCADA integration all in one environment.
Hardware and Flexibility
Allen Bradley systems like ControlLogix and CompactLogix are rugged and modular, making them suitable for facilities that need high customisability. The wide range of I/O modules including POINT and FLEX I/O remote modules gives you plenty of flexibility.
Similarly Siemens PLCs such as the S7-1200 and S7-1500 are known for compactness and efficient integration. With built-in diagnostics and streamlined DIN rail mounting, Siemens is well-suited to both smaller applications and high-speed industrial systems. Their remote I/O systems (ET200 series) are particularly effective for distributed applications without increasing hardware footprint.
Communications & Integration
One of the biggest differentiators lies in communication protocols. Allen Bradley natively supports EtherNet/IP and works well in setups already built on Rockwell infrastructure. Siemens favours PROFINET and PROFIBUS, with PROFINET being more deterministic than EtheNet/IP,offering slightly stronger integration for global operations and multi-vendor environments.
That said, both brands now support increasingly open standards like OPC UA and Modbus TCP/IP, making it easier to fit either into modern Perth-based control systems. Ultimately, your existing architecture or third-party systems might dictate the better match.
Cost, Support & Training
Allen Bradley generally comes at a higher price point in both hardware and licensing, but offers robust local support, which is especially valuable for time-sensitive industries. It’s a good fit for Perth businesses already standardised on Rockwell or looking for minimal training overhead.
Siemens is often the more cost-effective choice for larger or more complex projects, especially when factoring in licensing, software consolidation, and scalability. The company provides extensive documentation, online resources, and a growing support presence across Australia.
Which Should You Choose?
Choosing between Allen Bradley and Siemens depends on your business needs,existing infrastructure,budget,your team’s skills, and the size of your automation project. Both are reliable and powerful, but they focus on different strengths, like ease of use, flexibility, and future growth. Knowing these differences will help you find the best fit for your business needs.
Allen Bradley works well if your team is familiar with Rockwell software or prefers modular, rugged systems that are simple to program and maintain. It’s a great option for quick deployment and straightforward expansion using Ladder Logic.
Siemens is better suited for complex projects that require high speed execution.Its programming environment supports multiple languages and multiple automation components in one IDE giving engineers more flexibility for complex or customised solutions.
PLC Guidance for Your Perth Project
Choosing the right PLC system can be challenging. Whether you need help deciding between Siemens and Allen Bradley or want to optimise your existing setup, expert advice makes all the difference.
Scadalectric Automation specialise in both Allen Bradley PLC programming and Siemens integration across many Perth businesses. Our team has extensive experience with Studio 5000 and TIA Portal software, providing complete solutions from design and programming to troubleshooting and upgrades.
We’re ready to help you find the best fit for your operation now and in the future.
