摘要
目前,国内许多高速公路机电系统中所选用的智能设备均采用ＲＳ２３２或ＲＳ４８５接口。与这些智能设备进行通讯,通常使用的方法为:１、用Ｍｏｄｅｍ远程拨号通讯;２、用工控机和ＲＳ２３２/ＲＳ４８５设备捆绑,工控机接收远程数据,再转发给ＲＳ２３２/ＲＳ４８５设备。本文以汕(头)梅(州)高速公路莲花山隧道群监控系统为例,提出第三种办法,即用多路网桥扩展ＭｏｄｂｕｓＰｌｕｓ网络。
Most intelligent equipment of electromechanical system for highway uses RS232 or RS485 interfaces. The common ways to communicate with the equipment are: l.to telecom by an modem; 2.to connect an industrial computer and RS232/485. In the paper, taking monitoring and control system of Shantou-Meizhou freeway tunnels as an example , authors present the third method of extending the Modbus Plus network by an multiplex net-bridge .
出处
《广东自动化与信息工程》
2001年第2期33-35,共3页
Guangdong Automation & Information Engineering
