Abstract: It is required that setting information and mechanical correction information of a preceding device can be automatically carried over only by replacing a unit, to implement reduction in the maintenance cost and prevention of human operational mistakes. Library device control firmware 11 updates, if drive identification information kept in a library control unit 10 differs from drive identification information kept in two other units on the basis of logic of decision by majority, a drive serial number 4A and device setting information 2A kept in the library control unit 10 based on a drive serial number 4B and device setting information 2B kept in an accessor control unit 20.

Abstract: It is required that setting information and mechanical correction information of a preceding device can be automatically carried over only by replacing a unit, to implement reduction in the maintenance cost and prevention of human operational mistakes. Library device control firmware 11 updates, if drive identification information kept in a library control unit 10 differs from drive identification information kept in two other units on the basis of logic of decision by majority, a drive serial number 4A and device setting information 2A kept in the library control unit 10 based on a drive serial number 4B and device setting information 2B kept in an accessor control unit 20.

Abstract: A travelling track on which a plurality of movers travel is divided into sections of various lengths. A position/velocity calculator obtains the position and velocity of the movers in the sections, using the position and velocity of each mover having passed the boundary of the section in which the mover travels. A collision-chance determiner determines whether there is a great chance that each pair of neighboring movers will collide with each other, using the position and velocity obtained by the position/velocity calculator. An emergency stopper stops a pair of neighboring movers that the collision-chance determiner determined that they would collide with each other, in an emergency.

Abstract: A travelling track on which a plurality of movers travel is divided into sections of various lengths. A position/velocity calculator obtains the position and velocity of the movers in the sections, using the position and velocity of each mover having passed the boundary of the section in which the mover travels. A collision-chance determiner determines whether there is a great chance that each pair of neighboring movers will collide with each other, using the position and velocity obtained by the position/velocity calculator. An emergency stopper stops a pair of neighboring movers that the collision-chance determiner determined that they would collide with each other, in an emergency.