The development trend of LTE RTU and DTU

Reference Address: Http://www.winertech.com/projects_info.asp?id=143&ltertu

RTU is the abbreviation of remote TERMINAL UNIT, that is, remote Data terminal, used for monitoring, control and data acquisition applications. With telemetry, remote signaling, remote control functions.
LTE RTU is the use of 4G communication module in the RTU module, adding 4G SIM card, remote transmission and remote monitoring of data via 4G network. The popularity of LTE 4G networks will change the rapid development of applications in the IoT industry. From the original 2G (GSM/GPRS,CDMA) network to the current 3G (TD, WCDMA, or EVDO) have experienced the speed of Ascension, remote monitoring has begun to popularize, and LTE RTU fiber-level bandwidth, will be realized in remote telemetry, tele-signaling, remote control based on Add live environment audio and video to realize remote monitoring.
Currently DTU has been widely used in power, environmental protection, LED information dissemination, logistics, hydrology, meteorology and other industries. The principle of application is the same, although the industries used are different. Most are DTU and industry equipment such as PLC, collection instrument and other related acquisition industrial equipment connected, and then set up a wireless communication connection in the background. With the growing internet of things today, the use of DTU is becoming more and more widespread. Single because the DTU is a simple wireless transmission terminal, the communication protocol and functional limitations of its own, has been far from the current industrial automation monitoring purposes and requirements. Before by the front-End PLC (industrial computer) +DTU and remote upper unit configuration software applications, will slowly be replaced by RTU as the rtu+ configuration software mode.
Let's look at the process of RTU development:
The development of RTU technology has undergone several stages:
The first generation of RTU only for simple data acquisition, and some switching volume control, at this time the RTU data processing capacity is very limited, the field data must be transferred to the central control station, the central control station or the master station for data processing. At this time, the RTU communication capability is also very weak, characterized by a slow communication rate, a single way, and most of the use of custom non-standard protocol.
With the rapid development of semiconductor technology, the core chip of RTU-the function of microprocessor becomes more and more powerful, the data processing ability of RTU has been greatly improved, many more complicated algorithms and communication protocols have been realized, output control does not rely solely on central control station, usually provides local closed-loop control and regulation.
The rapid development of network and communication technology provides more advanced and excellent performance for RTU technology, and also brings more extensive application to RTU products. The networked RTU based on IP technology has fast response capability, open communication protocol and platform, and has become the mainstream industrial control product in the market. More and more manufacturers of traditional industrial controllers have shifted their product focus to RTU, while more and more new companies are adding to the RTU industry, including many communications companies like Motorola.
Today, RTU technology is developing in the direction of intelligence. Intelligent RTU can automatically determine whether the acquired data needs to be immediately escalated to the central control station, or can be temporarily retained in the local after the transmission, or until the central control station requirements to be transmitted again. Intelligent RTU can automatically detect the interruption of communication, and immediately begin to save the data to the memory, so that the most efficient use of communication networks. Intelligent RTU can also transmit those critical data to several central control stations at the same time. In addition, because security is the biggest problem in the current communication network, intelligent RTU can encrypt the data before transmission, or deny access from unknown address.
In the development of RTU, it is not difficult to see the function of RTU far stronger than the DTU, which is also the advantages of RTU development, for example: For that WCTU 31XX has now integrated multi-channel analog data acquisition and switching digital control unit, while supporting standard power, water Conservancy, Heat network and other widely used Modbus communication protocol, but also support the host computer diversified configuration software (Beijing power control, Asian control, Zijin Bridge, Kunlun Tong Tai, etc.). Can be directly connected to the front-end sensor or relay, thereby replacing the PLC part of the function, to achieve integration and cost savings. On-the-go local storage and the addition of LTE networks. RTU replacing DTU is a trend of development, power, environmental protection, led information release, logistics, hydrology, meteorology and other industries will be widely used. The maturity of LTE RTU will change the application of Internet of Things and the leap of industrial automation control field.

The development trend of LTE RTU and DTU