表用无极性RS485应用技术探讨

Discussion of the applied technology based on RS485non-polar of the watt-hour meter

为解决无极性RS485通信方案电能表在现场工作时发生的组网通信问题,文章先对智能电能表中应用的有极性RS485通信原理进行简单介绍,并指出无极性RS485相对于有极性RS485在原理上的改进措施。结合通信方式为无极性RS485的智能电能表配合老款集中器在现场应用中容易出现的组网问题,分析部分电能表应用的无极性RS485在原理设计上的不足,并提出改进方案,保证现场工作的智能电能表的RS485通信由原来的有极性方式向无极性方式的顺利过渡。

In order to solve the communication failure about intelligent watt-hour meter with non-polar communication solution in field , this paper firstly has a brief introduction to the polar RS 485 communication principle applied in intel-ligent watt-hour meter , and points out the improvement plan in principle between non-polar RS485 with the polar RS485.Combined with non-polar RS485 communication mode for the common fault of the intelligent watt-hour meter in field application situation , this paper analyzes the non-polar RS485 on the principle of design , and puts forward the improvement solution , which ensures that work at the site of the intelligent watt-hour meter has smooth transition be-tween the original polarity interface RS485 to the manner of non-polar.