Data communication method for reducing working time of automated material handling system

A data communication method for reducing a working time of an automated material handling system between a master communication device installed in an unmanned transfer device and a slave communication device installed in a manufacturing facility in the automated material handling system which transfers a carrier between manufacturing facilities through the unmanned transfer device, the method comprising:

• a first step in which the master communication device and the slave communication device perform RF (Radio Frequency) communication for setting work environment until the unmanned transfer device moves and stops at a work position of a manufacturing facility;
• a second step in which the master communication device and the slave communication device convert work control information based on loading and unloading work for a carrier into RF data, and transmit and receive the data to and from each other, in the state where the unmanned transfer device stops at the work position of the manufacturing facility;
• and
• a third step in which the unmanned transfer device starts moving along a rail when the loading and unloading work is completed in the manufacturing facility, and the master communication device and the slave communication device perform RF communication for releasing work environment.