A Comparison of CompactLogix vs. ControlLogix Processors
Introduction to CompactLogix and ControlLogix Processors
Allen-Bradley’s CompactLogix and ControlLogix processors are key players in industrial automation systems. While both offer robust control solutions, they cater to different applications based on system complexity and size. Let’s explore their unique features to better understand which suits your needs.
CompactLogix: A Compact Solution for Smaller Applications
CompactLogix processors are known for their versatility and cost-efficiency. Available in modular and all-in-one formats, they are well-suited for small to medium applications. Popular models include the L23, L30ER, and L35X. These controllers are designed to be ready for immediate use, with features like a built-in SD card slot, USB port, and embedded supercapacitor.
The ControlLogix: Built for Complex, High-Demand Systems
The ControlLogix series, originally released in 1999, is designed for larger, more intricate systems. These modular controllers provide expanded scalability with a power supply, processor, chassis, and communication modules. As the platform has evolved, newer models like the 5580 series offer significantly faster processing and enhanced communication capabilities, making them ideal for high-performance applications.
Key Differences in Memory and Communication
Memory capacity is one of the most notable differences between these two families. The ControlLogix 5580 boasts up to 20 MB of user memory, while the CompactLogix 5380 reaches a maximum of 10 MB. Both processors offer enhanced communication options, including high-speed Ethernet and USB ports, but the ControlLogix 5580 provides up to 1 Gbps Ethernet, significantly improving communication speed.
Performance Enhancements in Newer Models
The latest CompactLogix 5380 and ControlLogix 5580 models offer substantial upgrades in performance. The CompactLogix 5380 comes with a 1 Gbps Ethernet port and improved memory, while the ControlLogix 5580 outperforms earlier models with its increased speed and memory capacity. The ControlLogix 5580 offers an impressive 20 times faster program scanning compared to previous versions.
Comparison Table: CompactLogix vs. ControlLogix
| Feature | ControlLogix 5580 | ControlLogix 5570 | CompactLogix 5380 | CompactLogix 5370 L3 |
|---|---|---|---|---|
| Controller Tasks | 32/1000 programs/task | 32/1000 programs/task | 32/1000 programs/task | 32/1000 programs/task |
| User Memory | 3 MB to 20 MB + 6 MB safety | 2 MB to 8 MB + 4 MB safety | 0.6 MB to 10 MB + 5 MB safety | 1 MB to 5 MB + 1.5 MB safety |
| Built-in Ports | Single-port Ethernet (1 Gbps) | Dual-port Ethernet (100 Mbps) | 2 Ethernet ports (1 Gbps) | Dual-port Ethernet (100 Mbps) |
| Communication Options | EtherNet/IP, ControlNet™, DeviceNet™, USB | EtherNet/IP, ControlNet™, DeviceNet™, USB | EtherNet/IP, USB | EtherNet/IP, USB |
| Controller Connections | Not Applicable | 500 Connections | Not Applicable | 256 Connections |
Choosing the Right Processor for Your System
When selecting between CompactLogix and ControlLogix, consider your system’s size and complexity. For smaller systems with moderate I/O, CompactLogix offers a cost-effective, reliable option. On the other hand, for large-scale, high-performance applications, ControlLogix provides more robust capabilities and scalability.
