| 摘要 |
<p>PROBLEM TO BE SOLVED: To avoid conditions of disabled transmission of the remaining data, from a master station to a slave station by transmitting a polling response for extension from the slave station before the lapse of prescribed time. SOLUTION: Before the lapse of a prescribed time T from the transmission stop of a polling response 202, a slave station polling control part 105 in a slave station 1-104a transmits a polling response 204 (polling response for extension) for extending communication through a slave station transmitting/receiving part 106. Therefore, a master station 101 newly starts counting the prescribed time T with a means, such as resetting a counter for counting the prescribed time T. Therefore, communication can be extended as a result, and end of communication due to timeout can be avoided. In this case, since the polling response 204 for extension is not data to be sent from the slave station 1-104a to the master station 101, general data not be sent, but only the identifier of the slave station 1-104a is sent.</p> |
