Communication protocols - New events, was Communications protocols

> Roger,
>
> Would you consider Modbus/IP as a suitable protocol for use with
> Ethernet attached devices? This would seem to have most of the
> attributes you are looking for.

Hi Peter

I just wanted to say that this is the conclusion I have come to in surveying the real world for a common protocol over Ethernet. This seems like the closest thing to an open protocol on an open
transport. We need IO optimised for this protocol.

> I think a good example of what you are talking about is the ISaGRAF
> soft logic PC control software. The run time will operate under
> MS-DOS, OS-9, VxWorks, Windows 95, 98, 2000, NT, and CE and others.
> All of these support Modubus over TCP/IP/Ethernet (not sure it
> complies strictly with the Modbus/IP standard) but if you want OPC
> it must run under WinNT.

I believe it also runs under Linux and other *nix platforms but is expensive and binary only

cww

> I just wanted to say that this is the conclusion I have come to in
> surveying the real world for a common protocol over Ethernet. This
> seems like the closest thing to an open protocol on an open
> transport.
> We need IO optimised for this protocol.
>

I have looked again, it still falls far short of what I would like. On one side it matches it on potential simplicity (although the address
becomes a bit superfluous), but there is no conventional way to extend it.

I still think there is need for a re-work.