请教个问题,西门子200与仪表通讯,仪表的通讯协议有功能字: x 03 x x x x x x,03是代表读取,06代表写,那么是不是用西门子mudbus协议库与仪表通讯时,无论读仪表数据还是写仪表数据,都是要设置mudbus协议库命令为写?如果给仪表写上: x 03 x x x x x x后,是否仪表会自动把PLC要读的数据传送给PLC了
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