Programmable Logic Controller (PLC). Brian Caldwell Michael Davis November 28 th , 2007. Definition Dedicated computer for rapid processing of simple logic instructions in a defined time.
November 28th, 2007
PLC’s are widely available and used in several, in fact almost all automated processes.
Here is a simplistic view of a PLC system which consists of three main components: an Input/Output Section, the Processor and a Programming Unit.
Machine or Process
Programmable Logic Controller
In the figure, will the power on the first wrung normally be on or off?
And for the second wrung?