摘要 |
PROBLEM TO BE SOLVED: To collectively check arrival of a telegram to a destination and a response result to an operation request telegram, and to prevent occurrence of a state, where an incommunicable state causes incompatibility of processing relating to a game point with a game machine.SOLUTION: A telegram transmitted and received between a CU and a Pachinko machine comprises an addition serial number added and updated only in occurrence of an addition request from the CU to the Pachinko machine. The P machine sends back the same addition serial number in acceptance of the request, and sends back an addition serial number updated by subtracting the addition serial number by 1 in unacceptance of the request. Also, when an incommunicable state occurs after transmission of the addition request, the last final transmission addition serial number is received from the Pachinko machine after recovery from the incommunicable state to determine whether the retransmission of the addition request is necessary. |