Just a quick blurb on the talk I plan on giving in just over a week.
Programmable Logic Controllers are the "brains" behind almost all
industrial automation projects, from complicated robots and boiler
control to simple belt automation. These specialized computers
normally comprise of a industrially hardened processor with various
types of expandable communications and electrical interface adapter
cards, similar to a PC's ISA or PCI expansion capabilities.
Most PLCs are programmed with a graphical programming language known
as "ladder logic" which was originally designed as a form of schematic
for relay-based circuits. It has expanded through the years to
include various types of mathematical (add, subtract, multiply,
divide, etc.) and control (PID) capabilities.
I am planning on covering the history of relay logic, the evolution
and history of PLCs, a description of modern PLC capabilites and
technologies, related technologies such as PLC <--> database
interaction and Man-Machine Interfaces (a.k.a. "Human-Machine
Interfaces"), and of course I'll have a PLC on hand to do some
programming examples.
And of course I'll do my best to host a question and answer section
afterward.
Hope to see you there!
~John Blystone
The talk has been moved to NEXT Tuesday - May 1st, 2007.
It will be given in Mary Gladwin Hall room 204 on The University of
Akron campus (see www.uakron.edu for building location and parking
details). It will start at 7:00 PM, should last about an hour,
followed by an informal Q&A.
~John Blystone
The talk broke down into group discussion a lot earlier than planned,
so I did not get to say thanks to some key people or disclose some
important links.
Special thanks to Dr. Grover for all his help on making the talk
happen and getting the hardware ready, and Mark Church for sharing his
stories and experience with the group as well.
The following zip file includes PDF printouts of both the PLC code and
the HMI screens used last night (some we didn't get to).
For more information see the links page in the presentation.
Keep your eyes peeled for the upcoming Industrial SIG of ADG!