Si toos ah duubista CZ purlin samaynta mashiinka iibka kulul, waxay ku hagaajin kartaa cabbirka PLC hagaajinta; Sidoo kale, waxay u beddeli kartaa C iyo Z gacanta ama waxay awood u yeelan kartaa matoor koronto plc. Dhammaan cabbirrada waxaa lagu samayn karaa hal mashiin.