ABB 216DB61-HESG324063R0100 modular

ABB 216DB61-HESG324063R0100 modular

The rapid development of PLC technology, in addition to the objective needs of industrial automation, is mainly due to its many advantages. It solves the problems of reliability, safety, flexibility, convenience and economy that are generally concerned in the industrial field. The main features are as follows:
1. High reliability and strong anti-interference ability
High reliability and strong anti-interference capability are one of the important characteristics of PLC * *. The mean time between failures of PLC can reach hundreds of thousands of hours. The reason for its high reliability is that it adopts a series of anti-interference measures of hardware and software:
1) Hardware: I/O channel adopts photoelectric isolation to effectively suppress the impact of external interference sources on PLC; power supply and lines adopt various forms of filtering to eliminate or suppress high-frequency interference; important components such as CPU are shielded with good conductive and magnetic materials to reduce spatial electromagnetic interference
The module is equipped with interlocking protection, self-diagnosis circuit, etc.
2) Software: PLC adopts scanning working mode to reduce faults caused by external environment interference. The PLC system program is equipped with fault detection and self-diagnosis program, which can detect and judge the system hardware circuit and other faults. When the fault is caused by external interference, it can immediately seal the current important information and prohibit any unstable read and write operation. Once the external environment is normal, You can restore to the state before the failure and continue the original work.

2.3 Characteristics and functions of pIc
(Main characteristics of PLC. PLC is characterized by reliable operation, fast operation, building block structure, flexible combination, good compatibility, simple programming and generation, rich functions and strong network functions.
(Main functions of plc. PLC system can well complete industrial real-time sequence control, status control, count control, step control and other functions; it can complete analog/digital (a/d), digital/analog
(d/a) conversion, data processing, communication network, real-time monitoring and other functions. Years of practice shows that the plc has reliable performance, is designed for the factory, and the components are reinforced according to the requirements of the working environment,
Real-time scanning practice and fault diagnosis function, convenient for troubleshooting, are favored by users. What makes pIc so reliable is executable relay logic, sequence function diagram, function block and structure text
Command directory or combination of real-time kernel or operating system. In case of failure, the built-in equipment can maintain mechanical damage in an orderly and predictable sequence.
2.4 Development trend of PLC: it has extremely fast logic operation, logic control and sequence control capabilities, and has certain reliability in discrete control. The programming method is easy to learn
It has an undisputed position in the field of industrial automation.

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