RsLogix5000 - Read 1756-EN2TR IP Address

Hi everyone,

I'm looking for a way to read the IP address I set on my 1756-EN2TR card. I want to use it for internal logic in my controller. No need to produce the tag for other controller.

Every IO cards on my rack has built-in structure which contains settings but the EN2TR do not.

I do not want to change EN2TR setting with internal logic, I only want to be able to read them.

Any suggestion?

Thanks.

Some of the settings you can obtain using GSV instruction. See help -> GSV for more details.

I am not sure if you will be able to read IP address this way.

Look at the help file for GSV instruction. It part of the Module object.

Thanks guys, I'll try that.

I might have misspoken. I've done it, but with a MSG instruction using CIP Generic type.

See https://rockwellautomation.custhelp.com/app/answers/detail/a_id/26779

You can use a MSG instruction --
CIP Generic;
Get Single Attribute;
service code = e;
class = f5;
instance = 1;
attribute = 5

Your destination will be SINT[26] type tag.

Communication path is simply the name of your ENT2R.

The first four words, I believe will be the IP address, in backwards order: ie, 15,1,168,192 for 192.168.1.15.

Do note that because of the SINT, values > 127 will appear as negative numbers.

HTH. Good luck.

I checked everything about Module object and even the other object. There's a bunch of interesting option but not the IP address. It's probably too specific to be a "module" attribute.

Aaardwizz is correct; this information is not in the Module object (accessible by GSV) but rather in the TCP/IP Object, accessible by CIP Generic Message and the MSG instruction.

There's a good Knowledgebase document on the topic:

https://rockwellautomation.custhelp.com/app/answers/detail/a_id/26779


If you're already familiar with CIP Generic Messaging, it's a Get Attribute Single to Class F5, Instance 1, Attribute 5. I make the destination a SINT[32] then handle the data from there if I have to make a string out of it.

The data size varies depending on if you have a Hostname in your configuration, so make a larger SINT[x] array to be sure it accepts all the data, then shorten it to suit the actual response length.

I just did it on my EN2T to check, and it works fine.

The solution with the message works perfectly. Thank you all!