MASTER SLAVE COMMUNICATION SYSTEM AND MASTER SLAVE COMMUNICATION METHOD

摘要

In a master/slave communication system in which one master is connected to one or multiple slaves through a serial transmission line, and control data is exchanged between the master and the slaves in a predetermined communication period, a communication system in which the communication period does not fluctuate even when exchange of control data fails and is re-executed is provided. A communication control unit (130) in a master device (1) registers a slave in which a communication error is detected during exchange of control data. When there is time left in the communication period for resending, resending is executed for the slave in which the communication error is detected.