| 摘要 |
PROBLEM TO BE SOLVED: To recognize the cause of a communication error at all times between a master set and a slave set, moreover, between an external equipment and the master set by providing a communication error storage means for storing the communication error in a storage part in both of or one of the master set and/or the slave set. SOLUTION: The communication storage means for storing the communication error in the storage part 2 is provided in the both of or one of the master set A1 and/or the slave set. That is, in this system, a control part 3 controls a radio wave transmitting/receiving part 1 based on a control signal which is inputted by an input means 4 so as to execute carrier sensing, to transmit radio wave data, to measure a power source voltage or to store a communication state in the storage part 2 (the contents of the communication error and its time, etc., are stored). Besides, the control part 3 reads storage data from the storage part 2 (to read communication error data, etc.), or displays the control signal from the input means 4 and a communication result in a display part 6. |
