Emergency stop along the line, belt deviation, smoke, brake release not in place, longitudinal tear, coal pile at the unloading point, fault display and buzzer alarm. The display program has the function of locking, which can be eliminated only after reset; the control line along the line is broken, and the high-voltage fault, the protection switch itself has the function of action self-locking, and the fault display signal of the console can be removed after the fault processing; the corresponding intelligent digital display device completes the low-speed sliding and temperature protection, and provides the fault signal for PLC.