COMMUNICATION SYSTEM, POLLING/SELECTING METHOD FOR THE SAME AND RECORDING MEDIUM FOR RECORDING CONTROL PROGRAM FOR THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a communication system that can improve polling/selecting efficiency. ;SOLUTION: A master station transfers a selecting frame having two address data to a terminal device at a step S2. When the master station receives response data from the terminal at a step S3, it judges if status data are transmitted from other terminals after a time specified in advance and, when the status data are not received, a failure of the terminal is registered at a step S9.;COPYRIGHT: (C)1999,JPO