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Compact logix - change IP address remotely (over ethernet)

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I need to change the IP address of an existing PLC. Only access I have is remote (VPN). Is there any issue with downloading the same program - with the IP address changed - to the existing processor? Then change the local network range to match, etc...

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Yeah it should be fine. When you download the new parameters to the PLC, you will most likely lose the link. Just change your PC IP address and carry on. As a thought, if you add a secondary address to your PCs NIC, you might be able to go through the whole process without losing the link to the PLC. I've never tried that. Edited by MrAutomation

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The IP address is not set in the program, so changing and downloading doesn't do anything. You have to change it in the port configuration settings, which you can access directly through RS Linx, or from RS Logix. This can be done online, and if you change subnets, then you'll lose communication with the processor as soon as you make the change. Which processor do you have?

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