摘要
首先介绍电力行业标准DL/T645—1997多功能电能表通信规约和S7—300系列可编程序控制器点到点通信模块CP340的工作原理,给出了实际工程中CP340与多功能电能表分时通信编程框图和通信功能块的实际编程语句。
The power standard DL/T645-1997 multi-function watt-hour meter communication protocol is introduced, the work principle of S7-300 series PLC＇s PTP communication module CP340 is also introduced. A flow chart is drawn which describe how multi-function watt-hour meter communication with CP340 by timing. The practical program of communication block is shown.
出处
《电气应用》
北大核心
2006年第7期71-73,共3页
Electrotechnical Application
关键词
可编程序控制器
多功能电能表
串行通信
通信规约
PLC multi-function watt-hour meter serial communication communication protocol
