Modbus is a serial communications protocol originally published by Modicon (now Schneider Electric) in 1979 for use with its programmable logic controllers (PLCs). Simple and robust, it has since become a de facto standard communication protocol, and it is now a commonly available means of connecting industrial electronic devices
http://en.wikipedia.org/wiki/Modbus
Yes, I was aware of the origins of Modbus. I had the pleasure of implementing modbus serial communications on an Intel 4040 cpu based controller in 1979. Simple and robust then, archaic and poor performance now on modern harware.
Note that it is a
means of connecting industrial electronic devices NOT a protocol for communicating with people.
,
Personally, with all the security problems and patches Apache has had over the years, from 1.X.X versions to today, plus PHP vulnerabilities, and lack of following standards in different web browsers - I think Modbus is the only logical choice for a device that needs to "just work". The last thing we need in solar/wind/hydro controllers is to apply security patches to a freaking web server application in it.
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Chris
ok but doesn't matter about Apache, there are many web server software systems available,
I agree about a device that just needs to work, a black box, the
just needs to work part of the Classic does just that.
But it is marketed as a controller with the ability to provide reports to humans. Modbus doesn't do that or even facilitate intuitive communications, a Web interface does. Its a no brainer.. IMHO
My TV, DVD player, washing machine, home security system, garage door opener, wifi router, wifi bridges, cellphones, home entertainment centre, lighting control system and my Porsche 911 etc.. ALL have web interfaces to commmunicate with me.
dgd