SLC505 1747-L551B Ethernet Message Path

[Jim3846]

I am looking at an old program and doing a retrofit on a sorter. Looking at the ethernet interface, see attached pic, I see a path that is = "CLIENT".

Typically its an IP address: xxx.xxx.xxx.xxx

I thought maybe it was some symbol table reference but not that I could find anywhere.

Is this a dummy place holder so the old code could be using a host if customer wanted that option?

My real question is CLIENT is just a dummy tag.

Jim

 

[geniusintraining]

Try changing MiltiHop to yes then you should get a new tab, this is where the IP address is set, its been awhile since I have used the MSG

 

[Jim3846]

Thanks

I look at other SLC programs in past I hacked on and its show a physical address where multihop = no . example 192.168.3.15

Must be multiple ways to skin the cat.

I think all other past projects have push out this nugget of info.

Jim

 

[geniusintraining]

Here is some more info... when I get some time I will try and look up what I have done in the past, I just remember having mine set to yes and it also maters what your messing to/from and where

Chapter 12 https://literature.rockwellautomation.com/idc/groups/literature/documents/rm/1747-rm001_-en-p.pdf

 

[Ken Roach]

The "CLIENT" entry in the MSG control block comes from a legacy method for communicating between PLC-5E or SLC-5/05 controllers and PCs running Interchange, WinLinx, or RSLinx.

When you used "CLIENT" instead of a target IP address, the controller would look up a list of "unsolicited message clients" that had registered with the controller and send the message to them.

This only worked with the old CSP protocol, before ControlLogix, CIP, and EtherNet/IP.