Device and method of setting communication channel of OHT, and computer program for the method

A method of setting a communication channel of an overhead hoist transfer (OHT), the method comprising:

• receiving, by a master parallel input/output (PIO) provided in the OHT, a logistics transfer task command of the OHT;
• checking, by the master PIO, position information corresponding to the logistics transfer task command, based on the logistics transfer task command;
• checking, by the master PIO, unique number information of a slave PIO provided with a slave OHT corresponding to the logistics transfer task command, based on the logistics transfer task command and the position information;
• and
• setting, by the master PIO, a communication channel between the master PIO and the slave PIO, based on the unique number information of the slave PIO,
• causing the slave OT to travel according an information received through the communication channel,
• wherein the checking of the position information corresponding to the logistics transfer task command comprises:
• checking, by the master PIO, map information that is previously stored;
• and
• checking, by the master PIO, whether the OHT is located at a right position, based on the map information and the position information,
• wherein the map information comprises position information of the OHT with respect to at least one piece of equipment corresponding to the logistics transfer task command,
• wherein the checking of whether the OHT is located at a right position comprises:
• checking the position information included in the logistics transfer task command;
• checking current position information of the OHT;
• and
• checking whether the OHT is located at a right position by comparing the position information included in the logistics transfer task command with the current position information, based on the map information, and
• wherein the checking of the unique number information of the slave PIO comprises, when the OHT is located at a right position, checking the position information included in the unique number information of the slave PIO corresponding to the logistics transfer task command.