The applicat ion o f PLC to electr ical-contr ol o n t he operation o f the mov ing bo x in the mine is pr esented. The pr oblems in co ntro l that aro se in the past ha ve been so lv ed ow ing to t he g ood per formance of PLC including lo gicality , a nti-int er fer ence and small size. T he applicatio n of shift -r eg ister to the soft war e is introduced.