Industrial network apparatus and data communication method

摘要

An industrial network apparatus (1) includes: control data communication means (131) configured to transmit control data in a priority transmission period that occurs periodically; and message data communication means (131, 1316A, and 1316B) configured to determine whether or not to start transmission of message data in a non-priority transmission period depending on a required transmission time of message data and remaining time of the non-priority transmission period that is different from the priority transmission period, and to transmit the message data when determining to start transmission of the message data.