Extracting tag names from Allen Bradley PLC.

[tanaya]

Hello
I am able to read tag values from a PLC after providing the tag name using an open source Ethernet/IP library.
I wanted to know if it is possible to extract tag names from a PLC without using RSLogix or RSLinx softwares.

Thanks in advance.

 

[Dr.Seuss]

GOOGLE=== KEPServerEx this will allow you to do what you want.

 

[tanaya]

I forgot to mention that I want to use only Linux based tools.

 

[daba]

I forgot to mention that I want to use only Linux based tools.

I am curious as to why you want to interrogate a PLC to determine the tag-names used in the application ???????

 

[robertkjonesjr]

Check the OPC/ua driver from Inductive Automation. I know it runs on linux, I believe it is free, and am pretty sure it will browse logix tags. I know it can browse micrologix tags.

 

[Coulombboy]

I thought description and symbols are not saved in the PLC memory. I am not sure but I think tanaya is referring to the symbols/description. Is there a way we can save such into the plc together with the program?

 

[Ken Roach]

I think the OP is looking for the commands that cause the controller to list its database tags, and the Ignition OPC-UA server certainly knows them and uses them.

The Tag Database includes the names and the datatypes, but not the comments.

I have very little interest in the Linux tools developed for interfacing with ControlLogix over EtherNet/IP because they have been so casually abandoned by their developers.

 

[Archie]

See these forum posts on the GetTagList function in AdvancedHMI

http://www.plctalk.net/qanda/showthread.php?p=487142&highlight=gettaglist#post487142

http://advancedhmi.com/forum/index.php?topic=192.0