| 摘要 |
In a communication network comprising plurality of devices, each equipped with device operating circuit, communication interface for receiving command signals, control circuit coupled between the device operating circuit and the communication interface for controlling the operation of the device operating circuit part in dependency of said command signals, a control unit for generating control signals to control the operation of the devices, -a master for receiving the control signals and for generating command signals and transferring the command signals to the communication interfaces of the devices, each device is equipped with a master and the communication network comprises activating means for activating one of the masters and for activating another master in case the active master fails. The communication network is thus effectively and plurally protected against master failure.
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