COMMUNICATION SYSTEM, STANDBY DEVICE, COMMUNICATION METHOD, AND STANDBY PROGRAM

摘要

Down-time at switching of systems is reduced in a communication system that implements functional safety communication. Provided are a first preparation part 1222 that, when a functional safety communication initialization sequence is started between a slave and a control-system master, executes a first sequence group consisting of some sequences of the functional safety communication initialization sequence together with the slave; a second preparation part 1223 that executes a second sequence group being a sequence of the functional safety communication initialization sequence other than the first sequence group together with the slave when a failure of the control-system master is detected after execution of the first sequence group is completed; and a control communication control part 110 that starts control communication with the slave after execution of the second sequence group is completed.

主权项

1. A communication system comprising a computing machine, a control device to control the computing machine, and a standby device to replace the control device when a failure occurs in the control device,
the control device including: a control-side preparation part to execute a preparation sequence group including a plurality of sequences together with the computing machine; and a control-side communication part to start control communication for controlling the computing machine with the computing machine after execution of the preparation sequence group is completed by the control-side preparation part, the standby device including: a first preparation part to execute a first sequence group being one or some of the plurality of sequences included in the preparation sequence group together with the computing machine when the preparation sequence group is started between the control device and the computing machine by the control-side preparation part; a second preparation part to execute a second sequence group consisting of a sequence of the preparation sequence group other than the first sequence group together with the computing machine when a failure of the control device is detected after execution of the first sequence group is completed by the first preparation part; and a standby-side communication part to start the control communication with the computing machine after execution of the second sequence group is completed by the second preparation part.