The advantages of PLC (Programmable Logic Controller) mainly include the following aspects:
1. High reliability and strong anti-interference ability
High reliability: PLC adopts modern large-scale integrated circuit technology, is manufactured through strict production process, and the internal circuit adopts advanced anti-interference technology, which has high reliability. Some high-end PLC products such as Mitsubishi F series have a mean time between failures (MTBF) of more than 300,000 hours.
Strong anti-interference ability: PLC has strong resistance to external environmental factors such as electrical noise, voltage fluctuations and temperature changes, and can work stably in harsh environments.
2. Complete functions, perfect equipment and strong applicability
Rich functional units: In addition to basic logic processing functions, modern PLC also has perfect data computing capabilities and can be used in various digital control fields, such as position servo control, temperature control, computer numerical control (CNC), etc.
Wide range of application fields: PLC can adapt to industrial control occasions of various sizes, from single-machine control to multi-machine group control and automated assembly lines, and can play its role.
3. Easy to learn and use, simple programming
Intuitive programming language: PLC programming languages such as ladder diagram language (Ld) correspond to electrical operation schematics, which are intuitive, easy to understand and easy to master. In addition, there are many programming languages such as instruction list language (iL), function module language (Fbd), sequential function flow chart language (SFC) and structured text language (ST) to choose from.
Friendly programming environment: Many PLC manufacturers provide intuitive programming software, making the programming process simpler and more convenient.
4. Small system design and construction workload, easy maintenance and easy transformation
Modular design: The PLC system adopts modular design, and functional modules can be added or removed as needed, making system construction and maintenance more convenient.
Easy to transform: Since the PLC program can be reprogrammed, it can easily adapt to changes in production processes and carry out system transformation and upgrading.
5. Small size, light weight and low energy consumption
Compact design: PLC products usually adopt compact design, small size, light weight, easy to install and integrate into various equipment.
Low energy consumption: PLC has relatively low energy consumption, which helps to reduce the overall energy consumption cost.
6. Powerful communication capability
Multiple communication interfaces: PLC supports multiple communication interfaces, such as Ethernet, RS-232, RS-485, etc., which can realize communication between PLCs and between PLCs and other intelligent devices.
Remote monitoring and control: Through the communication function, PLC can realize remote monitoring and control, improve production efficiency and convenience.
7. Cost-effectiveness
Highly standardized and mass-produced: PLC products have been highly standardized and mass-produced, which helps to reduce costs and improve the cost-effectiveness of products.
In summary, PLC has been widely used and recognized in the field of industrial automation control with its high reliability, rich functions, easy-to-learn and easy-to-use programming environment, convenient system construction and maintenance, compact size and powerful communication capabilities.