Patent ID: 6704875
Filing Date: 2004-03-09
Classification: G05B,G06F,Y02P

Abstract:
A method of operating a controller using a processor for controlling an industrial machine having axes and at least one motor for the axes, said processor performing a plurality of processings in every predetermined period and being capable of operating in a low-electric power consumption mode, said method comprising:detecting an operating state of a cooling fan for cooling the interior of said controller; detecting temperature inside said controller; making the processor perform only minimum or limited processing required for resuming control of the axes in said plurality of processings to be regularly performed by the processor in every predetermined period and operate in a low-electric power consumption mode in a time period except the time period for performing said minimum or limited processing, when a stop of said cooling fan is detected or the temperature is detected to be higher than a first set value; and making the processor stop driving the at least one motor and omit processing related to the control of the axes, when a stop of the cooling fan is detected or the temperature is detected to be higher than a second set value.