Control device and communication system

A communication system comprising:

• a plurality of control devices that are connected to each other via a wired network;
• a plurality of opposing control devices that respectively perform wireless communication with the plurality of control devices;
• and
• an information processing device that is connected to the plurality of control devices via the wired network, and includes a setter that makes one of the plurality of control devices act as a master and makes the other control devices act as a slave,
• wherein:
• the master comprises:
• an acquirer that acquires information relating to a channel and a communication timing used for a wireless communication via the wired network from the slave;
• a generator that generates a setting of a channel and a communication timing that is free of interference in the wireless communication between the plurality of control devices and the plurality of opposing control devices, based on information relating to a channel and a communication timing used for a wireless communication that the master uses and information relating to the channel and the communication timing used for the wireless communication that are acquired by the acquirer;
• and
• a reporter that reports the setting of the channel and the communication timing generated by the generator to the slave via the wired network,
• the slave comprises a changer that changes a channel and a communication, timing used for the wireless communication of the slave in accordance with the setting of the channel and the communication that are reported by the reporter.