Significance of Automatic Control System Industrial Applications (robot, assembly line, . . .) Military Purpose (tank, missile, …) Exploration Purpose (New Continent, Moon, Mars, Pluto…) Transportation (automobile, ship, aircraft, …) Daily Common Life (washing machine, boiler, toys, air conditioner, … ) The significance of automatic control is rapidly increasing in various fields owing to the … Read more
PLC Origin Developed to replace relays in the late 1960s Costs dropped and became popular by 1980s Problems faced during the 60’s Now used in many industrial designs Control systems implemented using relay controller Lack of flexibility for process changes or expansion Troubleshooting “Five hours to find it … Read more
PLC’s (Programmable Logic Controllers), where first developed in 1968 at General Motors. At the time, General Motors could spend weeks replacing relay based control systems when making production modifications to cars or when they had to manufacture a different model to demand General Motors requested a system that could be programmed and maintained by plant … Read more
When select PLC Consider following : Application requirements. What type of inputs/outputs are required? What input/output capacity is required? What size of memory is required? What speed is required of the CPU? Electrical requirements. Communication requirements. Software. Operator interface. Physical environments. Application requirements : Input and output device requirements. List the function required and identify … Read more
Today we gone talk about how relays work .it’s relatively easy for anyone with an understanding of relay type control to program PLCs with little guidance. Some of you must have already used relays relays are used in our day to day devices like refrigerators, washing machines heaters and air conditioning. The earliest application of … Read more
The following is a growing list of ladder logic PLC programming instruction definitions and examples. Each instruction is hyper-linked to a brief description. The intent is to supplement the help files already provided with Studio5000 programming and configuration software. While the help files do a good job of defining the instructions, seeing believes. The following … Read more
What is ladder logic? Ladder logic programming is like virtual circuit building Imagine drawing an electrical circuit on your computer then downloading it into a device that would transform your virtual circuit into a real electrical circuit. Welcome to the world of industrial automation where the above scenario is played out daily and everywhere in-between. … Read more
What Is PLCs Programmable Controller (Programmable Controller) is abbreviated as PLC. It is a new type of industrial automatic control device developed on the basis of microprocessor, integrating computer technology, automatic control technology and communication technology. With the development of computer technology, programmable controllers, as general industrial control computers, have become increasingly powerful and cost-effective, and … Read more
PLC is an industrial control computer, and its working principle is based on the computer working principle, that is, it is completed by executing a user program reflecting the control requirements. Basic PLC working principle PLC takes microprocessor as the core and has many characteristics of microcomputer, but its working method is very different from microcomputer. … Read more
High reliability and strong anti-interference ability. Industrial production generally has high requirements on the reliability of control equipment, and must have a strong anti-interference ability. PLC can work reliably in harsh environments, with an average trouble-free time of more than tens of thousands of hours, which has been recognized as one of the most reliable … Read more