Controlling storage locations of products stored in storage containers in an automated storage and retrieval system

Abstract

A method controls storage locations of products stored in storage containers in an automated storage and retrieval system operated by container handling vehicles. The storage and retrieval system comprises a grid structure with storage columns adapted for holding stacks of storage containers. The grid structure has a corresponding rail system above the storage columns for guiding movements of the vehicles adapted for transferring storage containers to and from the storage columns. Each vehicle comprises a vehicle controller connected to driving means for controlling movements of the vehicle along the rail system relative to movements of other vehicles. Controlling of container handling vehicles and storage locations of storage containers is handled by a main controller of the automated storage and retrieval system communicating with a Warehouse Management System configured to register each storage container to be stored and type of one or more products placed in the storage containers. The method for storing storage containers includes: a transferring step, a transmitting step, a reading step, and a selecting step. The transferring step transfers a set of storage rules from the Warehouse Management System to the main controller. The transmitting step transmits unique identification codes of the storage containers from the Warehouse Management System to the main controller, and corresponding content codes from a content code module to the main controller. The content codes are linked to storage rules that the main controller will apply for storing the storage containers at locations defined by the storage rules. The reading step reads the content codes in the main controller, and determines a storage location for the storage container according to the storage rule linked to the content code. The selecting step selects container handling vehicles for transferring the storage container, and for each selected container handling vehicle transmits instructions from the main controller to the vehicle controller to transfer the storage container to a storage location defined by the corresponding storage rule and updates a storage location database with the identification and storage location of the storage container.