The present disclosure provides a conveyor system controller (11, 12, 13, 14), comprising: a data storage unit (101) configured to store a plurality of data entries, each data entry comprising a data entry ID, a data entry version identifier, and a data payload representing operating information of the controller or another controller; a processing unit (102); a first interface (103) for communicating with another controller. The controller is configured to transmit a first data packet comprising data entry ID and data entry version identifier of a data entry in the data storage unit, to other controllers; and to receive a second data packet transmitted by said another controller, the second data packet comprising data entry ID and data entry version identifier of a data entry of said another controller; and compare the received data entry version identifier of the second data packet, with a data entry version identifier of a corresponding data entry in the data storage unit having a same data entry ID as the second data packet.