hien tai toi dang su dung plc omron len cung ranh ve siemen lam. nhung toi da giao tiep thanh cong giua may tinh va plc bang cach viet mot phan mem. theo toi viec giao tiep giua vdk va plc cung phai thong qua cach nay. truoc tien ban phai biet cach thuc ma plc goi mot du lieu di va ma lenh de no nhan dien cau lenh cua minh. sau do tu vdk ban cu lap trinh cho no goi ma lenh xuong plc la xong. chuc thanh cong!