In these cases, industrial tablet PCs need to use the power-off protection function: in most industrial tablet PC applications, due to various complicated environmental components, industrial control buildings are inevitably faced with sudden power failures. In order to ensure the certainty of the system operation status and the completeness of recorded data, when the power supply of the system is restored, the field data can be restored in real time, avoiding the clutter of the system. In order to ensure the real-time nature of the stored data, the storage frequency of field data will be higher, so the rate of requesting data storage should be sufficiently fast, so as not to affect the normal operation of the application. For the current non-volatile memory, NandFlash, NorFlash, and EEPROM, there is a certain erasure and write life limit, and the write rate is not high, which is not conducive to the real-time retention of field data. But the cost is lower.
For some non-volatile memory with higher cost, such as ferroelectric memory, it is not conducive to reducing the cost of the product; and the capacity is not large. For the current volatile memory such as DDR, the data write and read rates are the highest, but after a power failure, all data will be lost. If a backup battery is used, the data will not be lost if the DDR is continuously powered on. However, the battery has charging and discharging time, and the service life is limited. It is also not conducive to the protection of the product and the reduction of costs. Therefore, the industry proposes a low cost and highly reliable solution of "NandFlash plus DDR plus Farad capacitor (also called super capacitor)". NandFlash (SLC) has the characteristics of high erasing times, up to 100,000 times, long data storage time, and low cost, and is used by most embedded industrial panel computers.
Features and application limitations of industrial panel PCs
An industrial tablet computer is a tablet computer used in industrial control. The difference from civilian tablet computers lies in the hardware inside. Numerous products for the industry are selected as industrial motherboards, and countless are specially customized for industrial control platforms. They have good flexibility and flexibility, and can meet the needs of various insidious situations. The difference between it and the commercial motherboard is that it is not mass-produced, and the product model is relatively stable. It can also be seen that the cost of industrial tablet computers is also higher than that of civilian tablet computers, and the other is the RISC architecture. The demand in the industry is relatively simple and simple, and the performance requirements are not high, but the stability is very good.
The characteristics of industrial tablet PCs: As the performance of commercial machines is getting better and better, many industrial sites have first adopted cheaper and cheaper commercial machines, and the trend of commercial machines has also undergone huge changes. People are more inclined to be more humanized. touch tablet computer. Therefore, in the industrial scene, the tablet computer with touch function will be the trend in the future. The industrial touch panel computer is also a kind of industrial tablet computer. Compared with the general industrial tablet computer, it has the following advantages. The front panels of industrial touch panel computers are mostly made of aluminum-magnesium alloy die-casting, and the front panels reach the NEMA IP65 protection level. Solid, durable, and relatively light.
Application platform of industrial tablet computer: The industrial site can be embedded in machinery, cabinets or placed on the console to be a man-machine display operation interface. It is used in various platforms such as telecommunications, electric power, multimedia, national defense, automated construction, and production industries, and is used as human-machine interface, thin client, PLC and POS and other communication and control terminals. Banks, shopping malls, hotels, railway stations, Volkswagen, subway stations, parks and other public places as media (advertising) players or interrogation terminals. There is no terminal for home service in the community, complete intercom, message, cost inquiry, commodity ordering, household appliances management, temperature and humidity control, etc.
