A Comprehensive Guide: Connecting Allen Bradley and Compactlogix Controllers via Ethernet

Introduction

In today's digital age, connecting your programmable automation controller (PAC) to Ethernet is vital to leverage the full benefits of remote monitoring, control, troubleshooting, and maintenance. Whether you're working with Allen-Bradley or CompactLogix devices, we've got you covered. This comprehensive guide will walk you through the step-by-step process for both.

Gather the Required Equipment

Before you embark on this journey, ensure you have the necessary equipment:

• Allen-Bradley or CompactLogix controller
• Ethernet cable
• Computer with Ethernet port (or a USB to Ethernet adapter if needed)
• Relevant software (RSLinx and RSLogix 500 or Studio 5000 for Allen Bradley; RSLinx Classic for CompactLogix)

Set Up Your Computer

Configuring your computer correctly is the first crucial step. Most PCs have network adapters set up for DHCP by default. To establish a connection with Allen-Bradley or CompactLogix Ethernet-enabled devices, it is essential to configure your PC's network adapter with a static IP address within the same subnet as the device. Steps to set a static IP address vary by Windows version, but we'll provide an outline for Windows 7 and XP that can be adapted for other versions.

Configure IP Address and Subnet for Your Device(s)

Properly configuring the device's IP address and subnet is crucial. CompactLogix controllers, such as those from Allen-Bradley, can utilize the BootP software utility. Depending on the specific device, you can opt for a manual setup through rotary switches, local HMIs, or USB ports. After completing the setup for Allen-Bradley devices, it's essential to disable BootP-DHCP to prevent IP address requests during power cycles.

Configure Your Driver in RSLinx Classic (for CompactLogix) or RSLinx (for Allen Bradley)

RSLinx Classic or RSLinx software facilitates communication between your computer and the PLC. Ensure that you configure the appropriate driver for Ethernet communication.

Establish the Ethernet Connection

Now, you're ready to connect your controller to your computer:

1. Connect one end of the Ethernet cable to the controller's Ethernet port.
2. Connect the other end of the Ethernet cable to your computer's Ethernet port.

Test the Connection

After setting up the connection, perform the following tests:

• Open a web browser and enter the controller’s IP address. If the controller's web interface appears, the connection is established.
• Try accessing the controller's data and performing basic operations to verify the connection's functionality.
• You can also test the connection by uploading a program to the PLC using RSLinx and RSLogix 500, Studio 5000 (for Allen Bradley), or RSLinx Classic (for CompactLogix).

Conclusion

Connecting your Allen-Bradley or CompactLogix controllers via Ethernet is an essential and straightforward process that enhances the functionality of your industrial automation applications. This comprehensive guide should help you establish a reliable, efficient connection to your controller, whether you're a seasoned professional or a beginner.