摘要
本文通过对西门子S7-200系列PLC的自由口通信方式和串行通信方式的电子天平的研究,将S7-200 PLC通过RS485/232有源通信转换模块与电子天平连接,实现了PLC对电子天平的控制和对称量数据的传输与存储。
In this paper through research on the Siemens S7-200 PLC series of free port communication and serial communication electronic balance￡-the S7-200 PLC connected to the electronic balance through RS485/232 active communication conversion module,achieved the PLC to control of the electronic balance and the weigh data￡§s transmission and storage.
关键词
自由口通信
电子天平
中断
Free communication
Electronic balance
Interrupt
