RADIO MASTER UNIT, RADIO SLAVE UNIT, AND RADIO DATA COMMUNICATION SYSTEM

摘要

PROBLEM TO BE SOLVED: To set a standby frequency channel group in a matching standby mode without setting a radio frequency channel in advance.SOLUTION: A radio master unit includes: a matching switch (13) which can communicate with a plurality of radio slave units by radio and is operated from outside to designate a matching standby; a notification part (14) which gives notice of the state of the matching standby; a clocking part; and a control part (9) which sets a standby frequency channel group for a matching request message from a radio slave unit on the basis of an operation time of the matching switch (13) measured by the clocking part once the matching switch (13) is operated, and makes the notification part (14) gives notice in a notification mode corresponding to the set standby frequency channel group. Thus, the standby frequency channel group corresponding to one frequency channel of the matching request message can be easily set by a single operation without making an arrangement of the frequency channel of the matching request message in advance.