Master and slave system wherein master interface unit compares parameter from payload of parameter obtaining command with communication capability parameter of parameter display unit

摘要

A communication system including a master device and one or more slave devices enables parameters of the slave devices to be set in an efficient manner. A master device (2) transmits a parameter setting command as a broadcast command. A slave device (1) receives the parameter setting command, and compares the received parameter value with a parameter value stored in a parameter display unit, and transmits a parameter setting command to which the comparison result has been added. The master device (2) receives the parameter setting command transmitted from the slave device (1) and determines that the parameter setting has been completed.