Ethernet Communication Omron <-> S7

Hi,

We have a Client with a Siemens S7 317 CPU and a Omron CS1 CPU.
Both PLC's have a Ethernet card connected to it.

We would like to get some data transferd between these 2 PLC's via ethernet (TCP/IP). Preferably directly between the PLC's and not via OPC.

Is there some who has done this and how, I was thinking of using AG_Send/Recieve on the S7 side. But is there something similar on the Omron side?

Also I heared about Gatway Configurations.

If anyone has an idea or has executed this kind of communication. please let me know.

Thanx in advance.

Which TCP/IP for Both ?

Dear Shoop,



Ethernet protocol, or any protocol as i understand, generally stands on OSI model.



Well when I read it last it was a "7" layered Model , available as a optional configuration for the implementers (PLC manufacturers or others) for their various protocols.



Sorry, my English is very poor.



Those (OSI Structure) being : (Any one Please correct me where ever i go wrong )



1) A- Application Layer -Top most layer

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2) P- Presentation Layer (I guess for encryption)

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3) S- Session Layer

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4) T- Transport Layer

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5) N- Network Layer

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6) D- Data Link Layer ( I have some confusion about this layer.

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7) P- Physical Layer (Hardware medium)Like Ethernet, RS232, 485..

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Now TCP/IP is basically a 4 layered STRUCTURE (I have forgotten all, but I guess I am correct)



Each PLC has its own Application Layer for Standard implementation of TCP/IP. Thus to my knowledge you can not connect the two TCP/IP Protocols from different PLC vendors directly on the same backbone and conduct communication without any Gateways in between. Open standards for all PLC vendors for TCP/IP I guess is on its way soon. (Someone please correct me here).



Gateways are many...

You could try HMS (From Sweden) They give many such solutions. I hope someone else gives you more details on other such gateways.



Regards

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