6FC5372-0AA30-0AA1模塊西門(mén)子
Question
當(dāng)連接在PROFIBUS DP2 (DP/MPI - X136)上的PLC bs/outputs被讀寫(xiě)時(shí), 出現(xiàn)信息"Wait: Access to system variable". 什么原因?
Answer
對(duì)$A_OUTA[1]操作時(shí),PLC輸出字AW274 通過(guò) MN_HW_ASSIGN_ANA_FASTOUT[0]=5000112 分配.
NC對(duì)PLC I/Os直接訪問(wèn)只有在應(yīng)用NCU 7x0.3 PN (current CNC-SW 4.5SP2)時(shí)才能實(shí)現(xiàn),這時(shí)PLC I/Os連接在PROFIBUS DP1 (DP - X126).