Thanks for your all your responses.
Mellis: I've been away from this project for awhile, and now have some time to spend on it again.
Basically we are trying to achieve line control over Ethernet. There will be a single compact logix PLC as the "master PLC", and each individual machine will have its own subsequent PLC (some ML1100's, and some ML1500's with ENI adaptors).
In response to your post above, you hit the nail on the head in that I misunderstood the message operation. I was indeed expecting A write, and a corresponding read in the recipient PLC.
Currently I'm setting up an ML1100 on the bench to send some info to the CPX.
The ML1100 has a MSG instuction loaded in:
"THIS CONTROLLER"
* Message File = MG13:0
* Channel 1 (Integral)
* Communication Command: PLC5 Write
* Data Table Address N7:0
* Size in Elements: 1
"TARGET DEVICE"
* Message Timeout: 33
* Data Table Address: N11:0
* Local Remote: Local
* Multi Hop = Yes
* Routing Information File: RI10:0
Hop is setup with the CLX'es IP.
I presume the example most appropriate here is the example: "Configuring a MicroLogix 1100 CIP Generic Message via Ethernet (OS Series B
FRN 4 or later)"
There isn't an option for "CIP Generic", is this version related?
From the CLX end, when you say, use a micrologix style address, how exactly do you do this? It wont allow the colon in the tag description, and if you enter the ML1100 syntax in the Alias column, it is unhappy with this and is unverifiable. How do I tie this up? Throught the Map PLC/SLC Message function? I haven't found this in a manual yet, any pointers as to where I can find it, or advise as to where I am going wrong would be much appreciated.
Cheers.