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DL/T-645 communication protocol and an independent dual-interface

mont & InstrumentationVo1.42No. 476Aug. 2005 machine is designed to a high standard 3U 19-inch chassis, reasonable structure, compact, convenient table in the energy field screen or FAG screen installation and use. 2-3 Function Energy Meter device monitoring alarm device is usually installed in the network control room or control room, connected to its energy meter and metering system for real-time monitoring, collecting at the Energy Meter electric parameter data, display monitor state energy meter, power meter, and once the metering system found in the following phenomena: the loss of any channel voltage, under voltage (more than the main program flow chart set limits in Figure 5), lack of equal fault phenomena; three-phase voltage and current imbalance exceeds the set limit; measured balance of the system (such as transformer or bus) over the set limit; monitoring device communication error occurred; monitoring device loses external power supply, etc., the device that is able to immediately send alarm to notify personnel on duty; failure occurred while recording the name of meter and time of occurrence. Device to automatically save the previous cycle of failure and the normal fault condition indication related to electrical parameters in order to facilitate analysis of events, more accurately calculate the amount of power due to failures caused the loss. The device also can be configured according to user needs and to collect the monitoring of electricity meter data, long-term preservation, and automatically generate the power curve of 5-minute intervals, easy to load analysis; standard serial interface and DIJT645,discount mbt shoes, the red phase, ABB communication protocol for the connection of other similar equipment; Velvet will also be extended on demand COM interfaces, or access to other instruments,uggs, or access to GPS signals, the function expanded. 3, the application of the device type Ⅲ machines of this device Lae power plants in Shandong, due to better solutions in the Energy Meter Plant effective control issue and the realization of important equipment \Therefore, within the network in Shandong Province has been widely recognized. The end of 2004, a total of 12 power plants to install this device is operating in good condition. Device operation in the field a total of seven power plants were issued a warning signal 9, as the alarm time, the factory can be found in the shortest time point of failure, the failure to deal effectively in a timely manner, avoiding the more power plants loss. Recently, we have further developed the IV machines. Completion of this unit to the scene of the pilot phase, we applied for a patent, patent number: ZL02213327.5. Meanwhile, a redesigned data acquisition module also declare a patent protection,mbt calzature, patent number: ZL01262245.1. References [11DDT448-2000. Energy metering device technology management point of order [S】. [2】 Zhao Maotai. Principle and Application of Intelligent Instruments [MI. Electronics Industry Press, 1999. [3】 Yangxin Rong, Ling Yuhua and so on. Modern Control Technology and Intelligent Instruments [M】. Hunan Science and Technology Press. 1995. Author: Song Wenjun (1961 a), male, senior engineer, engaged in energy measurement technology work. Received :2005-04-05 (Liu New Development) (Continued from page 64) to the next frame. Must be pointed out that in order to ensure the complete independence between the two interfaces work, to use two different sets of send and receive buffers, pointers, logos word, and open to interrupt each other. 3 Conclusion DIJ factory r. 645 Statute of the type of equipment in the power system is widely used measure, the proposed dual-port implementations, and other non-independent dual interface is different from the two ports to achieve this by fully independent and can work simultaneously to achieve a simple,ugg boots, cost-effective for wide. In my development DTSD1102 series multifunction table applications, running more than two years, the actual effect is good. A 3O A [1】 DL, r_45 a l997. [2】 PhotomodulesforPCMremotecontrolsystems [J】. VishayTele-funken. 2Ooo. (9). [3】 PIC16F7XDatasheet [S]. MierochipTechnologyInc, 2002. Author: Chu Zhao Bi (1970 a), male, master, lecturer, automation, mainly engaged in intelligent instruments, fieldbus and other applications and research work. Feng Xiaoying (1972 a), female,ugg boots sale, Master, lecturer, automation, mainly engaged in network communications, DCS control systems and other applications and research work. Received :2005-04-03 (Qiu source compiled and distributed)
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