| 摘要 |
PURPOSE:To relieve the load to a center and to receive information without error by repetitively transmitting information with error detection code from a center equipment and allowing a receiver side to receive succeeding repetitive transmission information when an error is detected. CONSTITUTION:When a center equipment 1 sets a transmission line in a form of 1:n to slave equipments 6 of plural contractors, a transmission control section 3 adds an error check code to transmission information and sends the information repetitively for a preset repetitive number of times. Upon the receipt of the transmission information, an error detection section 7 of the slave equipment 6 checks the information and stores it sequentially to a reception memory 9. When the result of error detection is fed to a reception control section 8, the result is stored in a table 10. When a first reception is finished, the reception control section 8 receives 2nd transmission information, and when the state of error check is stored in the table 10 even by the reception of the 2nd transmission information, 3rd information is received and when the error detection state is eliminated, the reception is finished.
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