초록 ▼

A distribution computer 10 and a plurality of controllers 12.about.15 are connected together via a LAN. One of the controllers acts as a main controller 12 to transmit control from the distribution controller 10 to the controllers 12.about.15. The controllers 12.about.15 are duplicated so as to back

A distribution computer 10 and a plurality of controllers 12.about.15 are connected together via a LAN. One of the controllers acts as a main controller 12 to transmit control from the distribution controller 10 to the controllers 12.about.15. The controllers 12.about.15 are duplicated so as to back up one another, and a main programmable controller 16 monitors the controllers 12 to 15 to detect defects. Arc nets 19.about.22 are connected together via an RS232C line to communicate the passage of a travelling vehicle between themselves. Even with an extended running path, the present invention hinders a delay in communication and thus a delay in control, thereby preventing system down caused by a defect in a controller.

대표청구항 ▼

1. A travelling vehicle system comprising a running path for travelling vehicles which is divided into a plurality of zones and a plurality of zone controllers for controlling the travelling vehicles in the corresponding zones, the system being characterized in that:said plurality of zone controller

1. A travelling vehicle system comprising a running path for travelling vehicles which is divided into a plurality of zones and a plurality of zone controllers for controlling the travelling vehicles in the corresponding zones, the system being characterized in that:said plurality of zone controllers are divided into a plurality of groups, a plurality of group controllers are provided for controlling the corresponding groups, and each of the group controllers backs up at least one of the other group controllers.