S7-1200如果要进行MODBUS-RTU通讯需要安装CM1241 RS485通讯模块或者SB1241 RS485通讯板
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S7-1200/.../DEMO Project S7-1200.ap10 S7-1200/.../Settings.xml S7-1200/.../PEData.idx S7-1200/.../Siemens.Automation.DomainModel.xml S7-1200/.../Main.xml S7-1200/.../PEData.plf
