S20360-SRS 施耐德 库存优惠

易卖工控网（www.ymgk.com）提供”S20360-SRS 施耐德 库存优惠”，产品详情：品牌/厂家：DCSPLC、型号：S20360-SRS、成色：全新、货期：现货 1天内发货、保修：180天，更多产品详情就上易卖工控网。

PLC与PC机之间实现通道，可使二者互补功能上的不足，PLC用于控制方面既方便又可靠，而PC机在图形显示、数据处理、打印报表以及中文显示等方面有很强的功能。因此，各PLC制造厂家纷纷开发了适用于本公司的各种型号PLC与PC机通信的接口模块。三菱公司开发的FX-232AW接口模块用于FX2系列PLC与计算机通信。还有与以太网连接的接口模块AJ71E71、与MAP网连接的接口模块AJ71M51-S1、与FAIS MAP网连接的接口模块AJ71M51M1等。不同的通信方式，有着不同的成本价格和不同的适用范围。在此介绍一种通过PC机的RS-232口与PLC进行通信的实现方法。

FX2系列PLC的编程接口采用RS-422标准，而计算机的串行口采用RS-232标准。因此，作为实现PLC计算机通信的接口电路，必须将RS-422标准转换成RS-232标准。

RS-232与RS-422标准在信号的传送、逻辑电平均不相同。


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