Which PLC uses Allen Bradley RSLogix 5000 software for programming of PLC?

Introduction

In industrial automation, software is just as critical as hardware. Allen-Bradley, a Rockwell Automation brand, is a leader in PLC technology, but each PLC family requires its own programming environment. Among these, RSLogix 5000, later evolved into Rockwell Automation's Studio 5000 Logix Designer, is one of the most widely used platforms. The key question many engineers ask is: which PLCs use RSLogix 5000?

The answer is straightforward—ControlLogix, CompactLogix, and the software-based SoftLogix controllers are the main PLC families supported. In this blog, we’ll break down these systems, their applications, and why RSLogix 5000 remains the preferred choice for modern automation projects.

Understanding RSLogix 5000

RSLogix 5000 was first introduced in the early 2000s as a replacement for RSLogix 5 and RSLogix 500, which were used for Allen-Bradley PLC-5 and SLC/MicroLogix controllers respectively. Unlike its predecessors, RSLogix 5000 was built to support tag-based programming, structured projects, and modular hardware families. This was a major leap forward in terms of flexibility, reusability, and scalability of code.

Later, Rockwell Automation rebranded the software into Studio 5000 Logix Designer, which now serves as the modern integrated development environment (IDE) for Logix-based controllers. Despite the new name, the term “RSLogix 5000” is still widely used in the industry, especially by technicians and engineers who have been working with Allen-Bradley systems for years.

ControlLogix PLCs – The Flagship Family

The first group of PLCs that fully utilizes RSLogix 5000 is the ControlLogix family. These are Allen-Bradley’s high-end, rack-mounted PLCs designed for large and complex industrial control systems.

ControlLogix controllers are modular, meaning you can add or replace CPU, communication, and I/O modules as your system expands. They are capable of handling thousands of I/O points, multiple communication protocols, and redundant configurations for mission-critical operations. Industries such as oil refineries, automotive plants, chemical processing facilities, and large-scale manufacturing often rely on ControlLogix due to their flexibility and raw processing power.

Some of the common ControlLogix processor models include the 1756-L61, 1756-L62, 1756-L63, 1756-L64, and 1756-L70 series. These processors integrate seamlessly with RSLogix 5000, allowing engineers to write ladder logic, structured text, function block diagrams, or sequential function charts depending on their application.

In short, if your project involves high-speed control, massive I/O, or integration with enterprise-level systems, a ControlLogix PLC paired with RSLogix 5000 is the go-to solution.

CompactLogix PLCs – Mid-Range but Powerful

While ControlLogix dominates large-scale systems, CompactLogix controllers fill the gap for mid-range automation needs. These PLCs are also programmed with RSLogix 5000 (or Studio 5000), but they are designed to be more compact and cost-effective than their larger counterparts.

CompactLogix units combine processing and I/O capabilities into smaller footprints, making them ideal for machine-level control, packaging lines, or batch processes that don’t require thousands of I/O points. Despite being smaller, they still support Ethernet/IP, motion control, and advanced data handling, which makes them highly versatile.

Some popular CompactLogix models include the 1769-L24, 1769-L32E, and 1769-L33ER. These controllers provide many of the same programming features as ControlLogix but are easier to deploy in tighter spaces or budget-conscious projects.

For many engineers, CompactLogix represents the sweet spot: the power of RSLogix 5000 programming without the complexity and cost of a full ControlLogix rack system.

SoftLogix – Virtual PLCs

In addition to physical hardware, RSLogix 5000 also supports SoftLogix controllers, which are essentially software-based PLCs that run on Windows operating systems. The most well-known of these is the SoftLogix 5800 series.

SoftLogix provides a virtual environment that behaves like a real Logix controller, allowing engineers to test and validate programs before deploying them on physical hardware. It is particularly useful for training, simulation, and prototyping, where purchasing a full ControlLogix or CompactLogix system might not be practical.

While SoftLogix is not as common in production environments, it remains an important tool in the RSLogix 5000 ecosystem.

What About MicroLogix and SLC Controllers?

It is important to clarify that MicroLogix and SLC controllers are not programmed using RSLogix 5000. Instead:

• MicroLogix PLCs (such as the 1000, 1100, and 1400 series) are programmed using RSLogix 500.
  
  

• SLC 500 PLCs also rely on RSLogix 500.
  
  

• PLC-5 systems, which are now considered legacy, use RSLogix 5.
  
  

This distinction is crucial for avoiding confusion, especially for beginners who might assume that all Allen-Bradley controllers use the same software.

Why RSLogix 5000?

The main reason ControlLogix and CompactLogix families are tied to RSLogix 5000 is because of their tag-based architecture. Instead of relying on fixed memory addresses like earlier PLCs, Logix controllers allow engineers to create named tags (e.g., “Motor_Speed” or “Tank_Level”), making programs easier to read, troubleshoot, and scale.

RSLogix 5000 also integrates seamlessly with Rockwell’s FactoryTalk suite, enabling advanced data collection, visualization, and enterprise-level integration. This makes Logix-based PLCs not only controllers but also vital components in digital manufacturing strategies such as Industry 4.0 and Industrial IoT (IIoT).

Quick Reference Table

Conclusion

To sum up, Allen-Bradley ControlLogix, CompactLogix, and SoftLogix controllers are the primary PLCs that use RSLogix 5000 (or its successor, Studio 5000 Logix Designer). These systems represent Rockwell’s modern, tag-based controller architecture, designed to handle the demands of today’s complex industrial environments.

If you’re working on large-scale automation with thousands of I/O points, ControlLogix is the obvious choice. If you need mid-range power in a smaller package, CompactLogix is a strong contender. And for simulation or training, SoftLogix provides a flexible software-only solution.

For smaller projects, however, MicroLogix and SLC families remain relevant but require RSLogix 500 instead.

Ultimately, understanding which PLC family corresponds to which programming environment ensures smoother project planning, better compatibility, and fewer headaches in the field. With RSLogix 5000, Rockwell Automation has created a versatile, scalable platform that continues to power industries worldwide.

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