METHOD FOR TRANSMITTING MESSAGES IN AN ELEVATOR GROUP CONTROL SYSTEM

摘要

THE METHOD FOR TRANSMITTING MESSAGES IN AN ELEVATOR COMMUNICATING SYSTEM (72A- 72K) SELECTS A SET OF ELEVATOR CARS FROM A PLURALITY OF ELEVATOR CARS IN THE ELEVATOR SYSTEM, AND COMPARES PRESENT DATA FOR THE SELECTED SET OF ELEVATOR CARS WITH DATA STORED IN A SINGLE TABLE. THE PRESENT DATA WHICH DIFFERS FROM THE DATA STORED IN THE TABLE IS DESIGNATED AS CHANGED OR DIFFERING DATA. THIS DIFFERING DATA IS TRANSMITTED TO THE PLURALITY OF ELEVATOR CARS. ALONG WITH THE DIFFERING DATA, RETRANSMISSION DATA (8C) ORDERED ACCORDING TO THE PRIORITY ASSOCIATED THEREWITH IS ALSO TRANSMITTED ALONG WITH THE DIFFERING DATA. IN THIS MANNER, A GROUP COMMUNICATION CONTROLLER (71) CONTROLS THE COMMUNICATION FOR SEVERAL ELEVATOR CARS. (FIGURE 10)