I am one of the lurkers in your midst. The discussions are extremely interesting. My company, Sealevel Systems, is interested in providing some sort of assistance to this project. We currently manufacture Serial I/O
boards and Digital I/O boards for PCs under Windows as well as Linux. Please see www.sealevel.com. We have not in the past done any real PLC type of designs, but our experience is in designing and manufacturing products that
communicate with various PLCs and other control devices. Several customers use our digital I/o for relays, etc running some version of control software on a PC.

If I can be of assistance please do not hesitate to ask. We are currently designing several I/O devices for Ethernet, and USB. We could help define some of the I/O, communications, or whatever.
Thanks,
Tom O'Hanlan
President/CEO
Sealevel Systems, Inc.
http://linuxplc.org/mailman/listinfo/linuxplc


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Hi Tom and welcome:

Ron Gage and I are both involved in Ethernet I/O, I don't know about Ron cause he's been working on AB stuff, but a solid implimentation of
Modbus/TCP would be great. I have two EIO schemes I'm looking at and both have unique proprietary protos. If there is an "open standard" for Ethernet I/O , Modbus/TCP would be it. Writing one driver for more than one product would be a lot easier than supporting dozens. I'll take
a look at your DIO as well. USB is not a priority as support under Linux is not very mature.

Regards

Curt Wuollet

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