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zhudapeng
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樓主  發(fā)表于: 2022-01-08 15:12
各們師傅好

我小白一個(gè)，想學(xué)習一下 S7-1200  利用擴展模塊 CM1241 RS422/485 模塊讀取一個(gè)儀表的數據

想想哪位師傅 發(fā)個(gè)樣本程序來(lái)看看；
yyande
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1樓  發(fā)表于: 2022-01-16 21:56
使用西門(mén)子的官方塊就可以了，在通訊指令下的通訊處理器欄，使用Modbus_comm_load 配置通訊參數，然后一般PLC是主站，使用Modbus_Master通訊就可以了。注意配置時(shí)Mode參數一定要配置，我就被坑過(guò)，第一次使用忘記配置結果通訊不上，檢查了好久。

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