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modbus通讯问题 #65

@Change0118

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@Change0118

与汇川PLC通讯,用的是modbus,最开始通讯可以正常写入,但是工作一段时间后往D100里面写数写不进去,重新与plc连接,再次写入也不可以,只能重新启动上位机。

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