| PLC is designed to replace a circuit relay sequential | | | | each of these elements. |
| in a control system. In addition to programmable, | | | | Power supply is used to provide power supply to |
| this tool can also be controlled, and operated by | | | | all parts of the PLC (including CPU, memory, etc.). |
| people who do not have knowledge in computer | | | | Most PLC work on the power supply 24 VDC or |
| operation in particular. | | | | 220 VAC. |
| PLC stands for programmable logic controller, | | | | Programming Console is a programming panel in |
| which has the following meaning: | | | | which there RAM (Random Access Memory) that |
| 1.Programmabledemonstrate ability in terms of | | | | functions as a semi-permanent storage in a |
| memory to store programs that have been | | | | program that was created or modified. Programs |
| made that easily altered function or usefulness. | | | | written to the console must be in the form of |
| 2.Logicdemonstrate the ability to process input in | | | | mnemonic. This device can be connected directly |
| the arithmetic and logic (ALU), which compares | | | | to the CPU by using a cable that can be installed |
| the operation, add, multiply, divide, subtract, | | | | ekstention and removed at any time. |
| negation, AND, OR, and so forth. | | | | Memory is a component for storing the program, |
| 3.Controllerdemonstrate the ability to control and | | | | To the PLC will work as expected then needed a |
| manage the process to produce the desired | | | | program to run it. The program should be stored |
| output. | | | | in a certain way so that the PLC can access |
| The basic elements of a PLC consists of a Power | | | | commands according to the instructions. One also |
| supply, Programming Console, Memory, CPU, input | | | | needed to store data temporarily during the |
| modules, output modules. following we describe | | | | implementation of the program. |