The application of PLC

1. High reliability, strong anti-jamming ability of high reliability is the key to the electrical control equipment performance. PLC as a result of the modern large scale integrated circuit technology, USES the strict production craft manufacture, the internal circuit adopted advanced anti-interference technology, has the very high reliability. Using PLC control system, compared with the same size of relay contactor system, electrical wiring and switch contacts have been reduced to hundreds or even thousands of points, one of fault is greatly reduced. In addition, the PLC with a hardware fault self test function, failure can alert information in time. In the application software, users can also into the application of fault self-diagnosis for the peripheral devices, in addition to the PLC in the system of the circuit and equipment for the protection of fault self-diagnosis. In this way, the entire system will be high reliability. 2. Complete, fully functional, applicability of PLC development today, has already formed the series products of all sizes, can be used in various industrial control occasions. In addition to the logical processing function, PLC has the perfect data computing power mostly, can be used for all kinds of digital control field. A variety of functional units, make the PLC penetrated the position control, temperature control, CNC, etc. Various kinds of industrial control. Combined with PLC communication ability enhancement and the development of man-machine interface technology, use of various of PLC control system very easily. 3. Easy to learn and easy to use, is welcome by engineering technical personnel PLC industrial control equipment for industrial and mining enterprises. It easy interface, programming language for engineering and technical personnel to accept easily. Graphic symbol and ladder diagram language expression and relay circuit diagram is quite close, for not familiar with electronic circuit principle and assembly language, don't understand the computer people engaged in industrial control opens the door. 4. System design, workload is small, easy maintenance, easy to transform PLC storage logic instead of wiring logic, greatly reduce the control equipment of external connection, has greatly shorten the cycle of control system design and construction, and maintenance also becomes easier, more important is to make the same equipment through change the program while it possible to change the production process. It is especially suitable for many varieties, small batch production. ( 2) Installation and wiring's power cord and power line, the line of control and the PLC I/O lines should be wiring, isolation transformer should be used between PLC and I/O double glue line connection. Separate PLC I/o line and power line line, such as slot must be on the same line, separate strapping communication lines, dc lines, if conditions permit, slot line best, this not only can make the space as large as possible, and to minimize interference limits. Stay away from strong interference sources such as welding machine, high power, low PLC silicon rectifier device and large power equipment, with high voltage electric equipment installation within the same switch cabinet. The PLC shall be far away from the power line (inside ark Distance between them should be greater than 200 mm) 。 With PLC controller is installed in the same cabinets inductive loads, such as large power relay, contactor coil, RC arc suppression circuit should be parallel. Low input and output of PLC controller should take line, separate the switch from analog to installation. Analog signal transmission should be shielded wire, shielding layer should be end or ends grounding, grounding resistance should be less than 1/10 of the mask layer resistance. Low ac output line and dc output line don't use the same cable, line of output should try to stay away from the high tension line and power line, avoid in parallel. ( 3) The input to the I/O wiring connection low input is generally not too long. But if the environment disturbance is small, the voltage drop is not big, longer input wiring can be appropriately. Low input/output line can't use the same cable, input/output lines should be visually separated. Low as far as possible the normally open contact form is connected to the input, the establishment of ladder diagram in accordance with the principle diagram of the relay, easy to read. Low output output connection wiring can be divided into independent output and public output. Can be used in different groups, different types and voltage levels of output voltage. But output can only be used in the same group of the same type, the same voltage grade of power supply. Low due to the output of the PLC components are encapsulated in printed circuit boards, and connected to the terminal board, if the output will be connected components of load short circuit, printed circuit board will be burned down. When using relay output, on the size of the inductive load, will affect the service life of the relay, therefore, when using the inductive load should be reasonable choice, or isolated relay. PLC output load interference may be produced, so we will take measures to control, such as dc output stream pipe protection, ac output resistance capacity of absorbing circuit, a transistor output and bidirectional thyristor bypass resistance protection.
plc controller price plc manufacturers is generally used to programmable control systems.
Energetic, optimistic entrepreneurs often tend to believe that sales growth will take care of everything, that Shenzhen Coolmay Technology Co., Ltd. will be able to fund our own growth by generating profits.
But we do think that reckoning with supply chains of plc manufacturers is a really important step. Even super simple switches in material, or sourcing, or shipping, or worker benefits seems like good place to start.
When selecting the best products for customers, we considered not only the plc manufacturers, but also the plc controller price.