Or programmable logic controllers (PLCs) are digital computer specifically designed for automation, machine control and factory assembly lines. It is now widely used in industrial automation technology. This controller is different from general-purpose computer, they are primarily of multiple inputs and output modes developed. Its programming is done using a special computer language that the LAD, IEC 61131-3, the instruction mnemonic is sufficient,Sequential Function Charts (SFC), Structured Text (ST), Function Block Diagram (FBD) for Basic or C, which can then be stored in batteries or in a non-volatile memory. Ladder Logic technology allows you to take action in sequence mode, which makes it easy to use, even for those who are inexperienced in this computer-based machines to work. Each program works depends on the specific user-written with regard to the order and timing of the course of action to do for theMachine.
In his early years, the automation system requires the use of different systems over a thousand individual relays. Now it has expanded its functions, PLCs and microprocessors are now used in real-time control relays, timers, motion control and replace other complexities that make it available in a multi-functioned device creates. It 'also has a variable (analog) output or input device, such as an ON and OFF. Although, with the currentPower relays, can be turned on or off automatically, without a mechanical switch.
Programmable Logic Controller
Among its many advantages, the PLC is very flexible. A machine can now have multiple functions and control of the various programs handling. It 'very convenient, since errors and changes can be easily developed by modifying the circuit, or a sequence to change. The monitor is equipped with continuous monitoring of ongoing processes to ensure that the troubleshooting and maintenance.There is also space efficient, because memory is always greater than in these days and many application systems can be set in a single PLC. Its duration is also one of its services because its extreme conditions like heat, dust, humidity and more able to bear. In addition, the productivity of this improved system performance and reduce operating costs have increased, and increasing worker safety benefits are among human PLC.
There are different types of controls, which in itselfon the market today. Since it was created for the purpose of cars, which will operate on the current trend in popularity in the equipment mainly because of its advantages, multi-functions and capabilities in harsh environments. Now there are various PLC, most, if not all machines need to adapt. Installation, Tutorial and modification of PLC are also on the market for those who are willing to purchase such equipment for the system. E 'convenient, affordable and easy for a particular purpose of the user preference has changed.
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