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<== Date ==> <== Thread ==>
Subject: Re: Siemen's PLC Interfaces
From: Rolf Keitel <[email protected]>
To: "Dalesio, Leo `Bob`" <[email protected]>
Cc: [email protected]
Date: Fri, 10 Nov 2006 08:58:03 -0800
Dalesio, Leo `Bob` wrote:
Is anyone talking to SIemen's PLCs over Profinet from a PC104?
Or talking to Siemen's PLCs using their ethernet protocol?
Thanks,
bob

We are talking to a Linde-supplied liquid Helium plant, which is controlled by a Siemens S7-400 PLC. We interface to the PLC with a Siemens TCP/IP module using the Siemens FETCH/WRITE protocol.
We made minor additions to our Modbus modtcp device/driver support, and support both Siemens FETCH/WRITE and Modbus/TCP out of the same device/driver support.
Presently we only read the Siemens PLC, but we are in the process of implementing write (trivial addition) and probably will have it tested by Christmas.

- rolf -

--
+-------------------------------------------------+
| Rolf Keitel, TRIUMF         Tel: (604) 222-7453 |
| Group Leader ISAC Controls  Fax: (604) 222-7307 |
| and Electronics Development                     |
| Vancouver, B.C., Canada                         |
+-------------------------------------------------+


References:
Siemen's PLC Interfaces Dalesio, Leo `Bob`
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