How To Find IP Address Of Allen Bradley PLC

Finding the IP address of an Allen Bradley PLC or Programmable Logic Controller is a crucial step in establishing communication with the PLC over Ethernet. In this article, we will go over a few steps you can try to find the IP address of your Allen Bradley PLC.

Step 1: Locate the Ethernet port on the PLC. This is typically a RJ45 connector located on the front or back of the PLC.

Step 2: Power on the PLC and check the status lights on the Ethernet port. The link light should be flashing, indicating that the PLC is connected to a network.

Step 3: Connect your computer or device to the PLC's Ethernet port using an Ethernet cable.

Step 4: Open a web browser and enter the PLC's default IP address in the address bar. The default IP address for Allen Bradley PLCs is typically 192.168.1.10.

Step 5: If the default IP address does not work you can use the "ping" command to search for the PLC on the network. Open a Command Prompt or Terminal window and enter "ping 192.168.1.255" (without the quotes). This will send a ping request to all devices on the network, and the PLC's IP address should be displayed in the response.

Step 6: Once you've found the IP address, you can use it to establish communication with the PLC using RSLinx Classic or other communication software.

It is important to note that some Allen Bradley PLCs may have a different default IP address, and in some cases the IP address may have been changed by the user. Consult the instruction manual for your specific PLC to confirm the default IP address and check if the IP address has been changed.

Be sure to consult the instruction manual for your specific PLC if you have any doubts or questions.