22-10-2010, 01:18 PM
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Logic control and PLC
Control system in which the variables are binary- they can have either of two possible values , 1 or 0 is a logic control system
Programmable Logic Control
Definition
“ A digitally operating electronic apparatus which uses a programmable memory for the internal storage of instructions for implementing specific function such as logic, sequencing, timing, counting and arithmetic to control through digital or analog input and output modules
