Issue
141 April 2002
Replacing
Relays with Ladder Logic
Part
2: The T100MD-1616+
by
Fred Eady
Last
month Fred introduced us to the T100MD-888+ and discussed
some of the basic functions and potential of the PLC.
This time around, he steps up to the 16 I/O port model
and delves into a communications application that talks
over an RS-485 LAN.
Start
•
The T100TM-1616+ • Forming
The Duet •
Recording The Music • Sources
& PDF
Some
of the greatest songs in musical history are performed
as duets. Being a Tennessee boy, my musical mind recalls
melodies from performers like George Jones and Tammy Wynette
and the contemporary country sounds of Tim McGraw and
Faith Hill. Of course, rock and roll had (and still has)
its share of duet performers as well. Jan and Dean, the
Everly Brothers, and Elton John with Kiki Dee come to
mind.
Because there’s math involved, I find that things that
work well for music usually work well for electronic things.
Although the previous statement is not one of the sacred
laws of embedded computing, it should be. With that thought,
let’s put a pair of T100MD’s together and make some control
music with a PLC duet.
