em vua moi ket noi luc dau thi ket noi thanh cong, nhung khi download chuong trinh va upload chuong tinh thi bao loi Diagnosticstatus faild:0x4, hien tai ket noi PC voi PLC microloix 1400 khong duoc nua, cau hinh nhu anh huong dan nhu tren(ket noi rs232) bao loi "Failed to find the baud and parity! check all cables and switch setting!"
Mong anh giup do.
thanks
lucnguyen