COMMUNICATION SYSTEM, COMMUNICATION-LINE SWITCHING METHOD, AND MASTER STATION DEVICE

摘要

A communication system in which a combination of redundant configurations of communication lines and a power-saving-mode operating function is incorporated, and includes a power-saving-device identification unit that identifies a slave station device in a power saving mode, and a line switching unit that switches a communication line forming a communication route from the currently used communication line to the backup communication line when a state where a master station device does not receive a signal from any of a plurality of slave station devices except for the slave station device identified by the power-saving-device identification unit as being in the power saving mode among the slave station devices continues for a predetermined time.