Features of PLC

High performers use software to replace a large number of intermediate relays and time relays, leaving only a small amount of hardware related to input and output, and the wiring can be reduced to 1/10~1/100 of the relay control system, and the failure caused by poor contact is greatly reduced. Next, let's take a look at the characteristics of PLC in detail.

Here is the content list:

• PLC has high reliability and strong anti-interference ability.

• The hardware of the PLC is complete, the function is perfect, and the applicability is strong.

• PLC is easy to learn and use, and is welcomed by engineers and technicians.

• PLC is easy to transform.

• PLC is small in size, light in weight, and low in energy consumption.

PLC has high reliability and strong anti-interference ability.

High reliability is a key performance of electrical control equipment. Due to the use of modern large-scale integrated circuit technology, PLC is manufactured with strict production technology, and the internal circuit adopts advanced anti-interference technology, so it has high reliability. For example, the average trouble-free time of the F series PLC produced by Mitsubishi is as high as 300,000 hours. Some PLCs with redundant CPUs have a longer MTBF. From the external circuit of PLC, using PLC to form a control system, compared with a relay contactor system of the same scale, the electrical wiring and switch contacts have been reduced to hundreds or even thousands of times, and the failure is greatly reduced. In addition, the Integrated solution for automation and operation has a hardware fault self-detection function and can send an alarm message at a time when a fault occurs. In the application software, the user can also program the fault self-diagnosis program of peripheral devices, so that the circuits and equipment in the system except PLC can also obtain fault self-diagnosis protection. In this way, it is not surprising that the entire system has extremely high reliability.

The hardware of the PLC is complete, the function is perfect, and the applicability is strong.

With the development of PLC today, it has formed a series of large, medium, and small-scale products, and has been standardized, serialized, and modularized. It is equipped with a variety of hardware devices for users to choose from, and users can flexibly and conveniently System configurations to form systems with different functions and scales. The installation and wiring of the PLC are also very convenient, and the terminal is generally used to connect the external wiring. PLC has a strong load capacity, can directly drive general solenoid valves and AC contactors, and can be used in industrial control occasions of various scales. In addition to logic processing functions, most modern PLCs have complete data computing capabilities and can be used in various digital control fields. A large number of PLC functional units have emerged, making PLC penetrate various industrial controls such as position control, temperature control, and CNC. Coupled with the enhancement of programmable logic controller communication capability and the development of man-machine interface technology, it becomes very easy to use PLC to form various control systems.

PLC is easy to learn and use, and is welcomed by engineers and technicians.

As a general industrial control computer, PLC is an industrial control equipment for industrial and mining enterprises. Its interface is easy, and the programming language is easy to be accepted by engineers and technicians. The graphical symbols and expressions of the ladder diagram language are quite close to the relay circuit diagram, and the function of the relay circuit can be realized conveniently only with a small amount of switching logic control instructions of the Industrial Automation Products. It opens a convenient door for people who are not familiar with electronic circuits, computer principles, and assembly language to use computers to engage in industrial control.

PLC is easy to transform.

The design, installation, and commissioning of the PLC system have a small workload, are easy to maintain, and are easy to transform. The ladder diagram program of PLC generally adopts the sequential control design method. This programming method is very regular and easy to master. For complex control systems, the design time of the ladder diagram is much less than that of designing a relay system circuit diagram. In addition, Wide Range of Quality Products at Great Prices uses storage logic instead of wiring logic, which greatly reduces the external wiring of the control equipment, greatly shortens the cycle of design and construction of the control system, and at the same time makes maintenance easier. More importantly, the same equipment can change the production process by changing the program. This is very suitable for production occasions with many varieties and small batches.

PLC is small in size, light in weight, and low in energy consumption.

Taking ultra-small PLC as an example, the bottom side of newly produced varieties is less than 100mm, which is only equivalent to the size of several relays, so the volume of the switchgear can be reduced to 1/2~1/10 of the original. It weighs less than 150g and consumes only a few watts. Because of its small size, it is easy to fit into the machine, and it is an ideal controller for mechatronics.

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