| 摘要 |
PURPOSE:To recognize the connection order of devices easily, by reading address information for every trigger signal into a service processor and transmitting address information in accordance with the connection order in the system where devices are connected into a loop successively. CONSTITUTION:Each of devices U1-U4 is provided with first and second flip flops FF1 and FF2, the FF1 is set by a recognition order signal ODR and a trigger signal TG, and the set output is inputted to the FF2 and is transmitted as the recognition order signal ODR to succeeding devices U2-U4; and device address information set to devices U1-U4 until the FF2 is set by the next trigger signal TG after setting the FF1 are transmitted to a data bus DG, and a service processor SVP reads device address information for every trigger signal TG to recognize the connection order. Thus, the connection order of devices is recognized automatically in the service processor SVP. |
