2007-07-19 17:23:44 · 3 answers · asked by M&I 1 in Science & Mathematics ➔ Engineering
A PLC is a Programmable Logic Controller. It is a microprocessor-based control system using a specially designed programming language. They were originally designed to replace relay control panels with a system that could be reprogrammed instead of being rewired when control needs changed. The original "language" for programming them was symbols used in a "ladder-logic" diagram.
2007-07-19 18:35:19 · answer #1 · answered by Helmut 7 · 1⤊ 0⤋
Programmable Logic Controller, PLC, or Programmable Controller is a digital computer used for automation of industrial processes, such as control of machinery on factory assembly lines. Unlike general-purpose computers, the PLC is designed for multiple inputs and output arrangements, extended temperature ranges, immunity to electrical noise, and resistance to vibration and impact. Programs to control machine operation are typically stored in battery-backed or non-volatile memory. A PLC is an example of a real time system since output results must be produced in response to input conditions within a bounded time, otherwise unintended operation will result.
2007-07-20 09:44:46 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Programmable logic controller. It is a I/O based processor. You give it an input, run it thru a logic sequence and gives you an output.
2007-07-20 00:31:26 · answer #3 · answered by rdelvallef 2 · 0⤊ 0⤋