请问三菱fx3u,西门子s7-200smart和s7-300怎么实现通讯?

2025-03-15 13:40:52
推荐回答(1个)
回答(1):

一、方案基本情况
该方案可适用于3台以上西门子PLC,S7-200或S7-200Smart之间实现一主多从Modbus通讯协议的无线通讯。
·适用PLC型号:S7-200和S7-200SMART
·通讯协议:Modbus-RTU
·通讯关系:一主4从
·通讯距离:3KM
·通讯方式:全数字加密无线传输
·无线通讯装置:DTD434MCY
西门子PLC专用无线通讯装置
二、方案的好处1.
免布线
2.
免运行费用
3.
传输稳定可靠,达泰电子16年工业无线通讯品牌
三、主站程序主站程序我们采用分时循环采集的方式来依次读写4个从站的状态。程序编程采用毫秒定时器【T32】来作为系统的通讯采集周期。我们可根据实际需求调整参数大小。若使用GPRS通讯方式,出于对流量成本的考虑,需要根据实际情况调整通讯周期,以免增加不必要的后期费用。
四、从站程序从站程序只需要根据主站的通讯格式设置保持一致,然后再使从站响应指令即可正常通讯。其他从站通讯程序,除地址不一样外,其他的参数均相同,后期可根据实际使用情况调整。
五、指令调用说明
【Modbus
Master
Port0(v1.2)】通讯口0作为Modbus主站用到的指令。
【MBUS_SLAVE】通讯口0作为Modbus从站响应主站读写指令

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