| 摘要 |
PURPOSE:To restore and transmit data, and to improve reliability by allowing a main device to send out data continuously even after a clock signal is transmitted by one record of the data when a reception side detects a data transmission error. CONSTITUTION:If there is a transmission error when an operating device transmits data to the main device, the microcomputer 7 of the main device sends a clock to the microcomputer 2 of an operation display device by one data as shown by 15 and then sends the clock continuously by another data without stopping as shown by 16. Said microcomputer 2 monitors the interval between a clock inputted from 5 and the next clock all the time and decides that data received previously is not received normally when the interval from the reception of the clock for sending the final data bit of one data to the reception of the next clock is <=1.5 time as long as a normal interval, thereby resending the same data as shown by 14. |
