Patent ID: 6917372

Claim:
A method for controlling replacement of terminal equipment in a building management system, in which a human-machine interface and a processor are connected via a LAN, and a plurality of terminal equipment each having a management point within a building are connected to the processor, said method comprising the steps of: providing a new processor; connecting new terminal equipment to the new processor as the old terminal equipment is replaced; providing in the human-machine interface a first table having information of hardward addresses of the old terminal equipment and the new terminal equipment, management points and statuses indicating whether the management points are connected to the old terminal equipment or the new terminal equipment; spreading out at an initial time the first table to a second table having information of correspondences between the hardware addresses of the old terminal equipment and a plurality of management points and flags indicating whether each of the old terminal equipment being used or not, and a third table having information of correspondences between the hardware addresses of the new terminal equipment and the plurality of management points and flags indicating whether each of the new terminal equipment being used or not; downloading the second and third tables as management point information in the old terminal equipment and the new terminal equipment, respectively; informing the human-machine interface of status changes at management points according to the management point information downloaded in the old terminal equipment and the new terminal equipment; and in the human-machine interface, receiving the status changes and displaying a status change at a concerned hardware address so as to monitor the replacement of terminal equipment of the concerned hardware address.