Experimental Physics and
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Is anyone talking to SIemen's PLCs over Profinet from a PC104?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 | +-------------------------------------------------+
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ANJ, 02 Sep 2010 |
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