1786-FS60

1786-FS60

1786-FS60

在工业自动化控制系统中，最为常见的是PLC 和变频器的组合应用，并且产生了多种多样的PLC 控制变频器方式，其中采用RS-485 通讯方式实施控制的方案得到广泛的应用：因为它抗干扰能力强、传输速率高、传输距离远且造价低廉。易能变频器内置国际标准的MODBUS（从站）通信协议，可非常方便的实现单台或多台变频器的远程通讯控制与监视功能。

下面以西门子S7-200CPU224XP为例，介绍PLC与易能变频器建立通讯并实现对变频器起停、频率给定、监控等功能的控制。

变频器作为MODBUS协议从站接收来自PLC的通信指令，必须做好以下准备工作：

1、用一根带9针阳性插头的串口通信电缆连接在PLC的自由通信口Prat0端，电缆另一端的第3、8线分别接在变频器RS485的485+、485－端子上，其余线屏蔽不用；

现货，现货，降降降，火火火，火火火……

现货，现货，降降降，火火火，火火火……

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◆ 联系人： 小廖（女士）

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诚信经营，质量为首，服务至上，厦门泰尼小廖竭诚为您服务！！！

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