Why PLC do so flat?

With PLC prices falling and the expansion of the user requirements, more and more small and medium-sized equipment begin to use PLC to control, PLC application in our country is growing very quickly. As China's economy and the rapid development of the domestic automation level unceasing enhancement, in the future for a period of PLC will continue to adhere to the momentum of rapid growth in China. Today's PLC main products can be divided into three schools: the United States, Europe and the mouth. With the rapid development of PLC in China, domestic PLC hold weight also is getting heavier and heavier. According to the statistics of PLC failure rate more than 95% in power, relays, communication port these places. So how to reduce the failure rate of these places of beauty made these changes to the PLC: external power supply, 90% failure preventing air temperature change, humidity change under the influence of factors such as air, dust, ultraviolet radiation damage to the equipment. The easiest fault takes place generally in the power system and communication network system, power supply in continuous work, heat dissipation, the voltage and current wave impact is inevitable. The possibility of communication and network by the external interference, the external environment is one of the biggest factors cause communication external equipment malfunction. PLC on the market at present basically is power built-in, and our product USES the external power supply, ruled out 90% of the failures. Relay is one of the best brands - Omron business cost control of PLC, selection depends on the I/O, is an important part of PLC I/O module. PLC's biggest weaknesses in the I/O port. PLC technology advantage lies in its I/O port, in the host system under the condition of technology level are inorganic, PLC I/O module is the performance of the key components, so it is also a prominent part of PLC is damaged. Despite the use of relay is one of the world's top ten brand of omron. Communication port RS - special protection 232 interface data transfer rate is low, the transmission distance is limited, anti-interference ability is poor, the RS - 422 adopts full duplex communication mode, USES the differential transmission mode, common-mode interference resistance increased. Beauty with 485, 485-232 high voltage, it is not easy to burn out. Through this way, the PLC failure rate greatly reduced, and the PLC volume is more small but the performance is better, these also got the customer approval for customer applications.