Communication System Method Of Switching Communication Link And Master Station Device

Abstract: The purpose of the present invention is to perform more suitable link operation by minimizing the possibility of erroneous switching to a reserved main communication link on the basis of the determination that a failure has occurred even when no failure exists in an in use main communication link. The communication system according to the present invention is a communication system having both the redundant configuration and the power saved mode operation function of a communication link which is provided with a power saved device identifying means for identifying a slave station device in a power saved mode and a link switching means for switching a communication link constituting a communication path from an in use communication link to a reserved communication link when a state of receiving no signal from any slave station device among a plurality of the slave station devices except for the slave station devices identified by the power saved device identifying means as being in the power saved mode has continued for a predetermined period of time.

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