On Jul 28, 1:40 am, "Hendrik van Rooyen" <[EMAIL PROTECTED]> wrote: > <[EMAIL PROTECTED]> wrote: > > > I'm attempting to start some process control using Python. I've have > > quite a bit of literature on networking, and have made some tinkering > > servers and clients for different protocols HTTP, FTP, etc... But now > > it's time for the murky web of industrial protocol. I'm looking to > > start with IO and servo controls via Ethernet. > > > Questions: > > > Is there an existing forum on this already? > > What protocols are the most python friendly? i.e. are transparent > > enough that i can create my own python driver. (or do these drivers > > exist?) > > What ethernet accesible servo and IO industrial devices have people > > had success with? > > What is it that you are trying to do? > Some of the commercial devices come with their own software, and > you may not need python or anything else. > A lot of the industrial connectivity is still RS-485 or RS-422 and not > Ethernet based - although some of the protocols, have, I think, been ported. > > If you say more, then someone can maybe help you, as there are quite a few > people on this group who seem to dabble in process control. > > - Hendrik- Hide quoted text - > > - Show quoted text
We're looking to run some industrial machinery from a PC. Starting with some basic servo controls and IO port reading for something like an XYZ table (just X would be a good start!). Now there is some existing software out there for PC control but this software is, to my understanding, largely unnecessary and "black box". This "black box" creates a problem when trying to e.g. control servos and IO with the same program. And if we want to include an HMI like a touchscreen, or export the machinery's production into a RSS feed, the web of software becomes messy and slow. If we could consolidate this software into a single, non "black-box" package, we could see significant improvements in development time. Having to program 3 different devices with three different languages to control your PLC, Servos, and module X is the status quo we face, but it is quite frustrating and limited. Soo.... I need to find some ethernet friendly IO, serial would be fine but but it's a leash in many instances. I know some protocols have been ported to ethernet, but I am having extreme difficulty figuring out what these protocols entail. ModBus/TCP is the one I'd like to choose. I know that people have done this kind of software but it seems that industrial python remains a bit taboo because of proprietary issues... Ty -- http://mail.python.org/mailman/listinfo/python-list
