Control system, information processing device, and non-transitory computer readable medium

An information processing device that is able to be connected to a control system including a plurality of apparatuses connected to a factory automation (FA) network,

• wherein each of the plurality of apparatuses includes a timer that manages a time,
• the timers of the plurality of apparatuses perform clock time synchronization with a reference timer that manages a reference time,
• the plurality of apparatuses includes
• one or more end apparatuses connected to ends of the network, and
• a plurality of transfer apparatuses that transfer data related to control to the one or more end apparatuses,
• the information processing device comprising:
• a timer decision means for deciding the reference timer out of the timers that the plurality of transfer apparatuses have,
• wherein the timer decision means includes a path indicator acquisition means for acquiring, for each of the plurality of transfer apparatuses, a path indicator which indicates a length of a path on a network through which data passes from the transfer apparatus until arrival at the one or more end apparatuses, and a candidate selection means for selecting one or more candidates for deciding the reference timer out of the timers of the one or more transfer apparatuses having the path indicator which indicates that a path until the arrival at the one or more end apparatuses has a predetermined length.

A non-transitory computer readable medium, storing a program that causes a computer to execute a setting method for a control system including a plurality of apparatuses connected to a factory automation (FA) network,

• in which each of the plurality of apparatuses has a timer that manages a time,
• the timers of the plurality of apparatuses perform clock time synchronization with a reference timer that manages a reference time,
• the plurality of apparatuses include
• one or more end apparatuses connected to ends of the network, and
• a plurality of transfer apparatuses that transfer data related to control to the one or more end apparatuses,
• the setting method includes the step of
• deciding the reference timer out of the timers that the plurality of transfer apparatuses have, and
• the step of deciding the reference timer includes the steps of
• acquiring, for each of the plurality of transfer apparatuses, a path indicator which indicates a length of a path on a network through which the data passes from the transfer apparatus until arrival at the one or more end apparatuses, and
• deciding the reference timer out of the timers of the one or more transfer apparatuses having the path indicator which indicates that a path until the arrival at the one or more end apparatuses has a predetermined length.