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多台三菱PLC如何实现无线以太网高速通讯?
2022-06-26 08:27:00 【mydatai】
以太网无线通讯一般有以下几个应用场景:
1.PLC与PLC之间无线通讯
支持点对点及点对多点,多台PLC之间以太网无线通讯

2.组态软件与PLC之间无线通讯
组态王、力控、MCGS昆仑通态、Wincc等主流组态软件与1台或多台PLC之间无线通讯

3.触摸屏与PLC之间无线通讯
人机界面触摸屏与1台或多台PLC之间无线通讯

在这几个应用场景中,要想成功实现设备间的无线以太网通讯都需借助以太网通讯终端,比如日系PLC无线通讯终端DTD419M 。它不仅能与 PLC、DCS、智能仪表及传感器等设备组成无线测控系统,同时能与组态软件、 人机界面、触摸屏、测控终端等工控产品实现点对点( PTP)和点对多点( PTMP )的远程无线组网,将分散不便于挖沟布线的设备连接在一起,不需要编写程序,不需要布线,并且稳定可靠。
并且,DTD419M采用 2x2 两发两收无线架构,空中传输速率高达 300Mbps,兼容三菱MELSOFT连接、MC、BCNetTCP、Scoket、Modbus TCP等通讯协议,并采用 OFDM 调制及 MINO 技术,使无线可靠传输距离达到1KM范围内均可使用。
下面就以三菱FX5U PLC之间以太网通讯为例,向大家说明如何利用以太网模块实现PLC间远距离Modbus tcp高速通讯。
三菱FX5U PLC之间的以太网通讯,其实是一种简易PLC间链接功能,就是在最多8台FX5u可编程控制器或者FX3u可编程控制器之间,进行软元件相互链接的功能。在实际系统中,同一个车间里分布多台PLC,通常距离在几十米到上百米不等。在有通讯需求的时候,如果布线的话,工程量较大且不美观,这种情况下比较适合采用无线通信方式。
以三菱FX5u-32MRPLC为例,在两台FX5u-32MRPLC以太网简易连接下的以太网无线通讯,在此过程中采用日系PLC无线通讯终端DTD419M,作为实现无线通讯的硬件设备。无需更改网络参数和原有程序,也不必了解协议细节,通过达泰日系PLC专用无线通讯终端--DTD419M,即可直接替换PLC之间有线以太网通讯,且稳定方便的实现无线通讯。
1.接线方式
用一根通讯线,一端接入DTD419M的RJ45接口,另一端接入FX5u的RJ45接口。
2.设备组态
①新建工程;
②打开参数-FX5UCPU-模块参数-以太网端口;
③设置主PLC的IP地址;
④简单PLC通信设置;
⑤主PLC通讯设置;
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