| 摘要 |
PURPOSE:To input the generation of a fire confirming signal required at minimum to a sub receiver even when a multiplex transmission line between a main receiver and the sub receiver is opened or short-circuited by adding 1 byte to a parallel data and allowing the sub receiver to read a parallel data of any one bit as a fire discrimination signal. CONSTITUTION:One byte is added to the parallel data and the parallel data of one bit is read by the sub receiver as the fire discrimination signal. Even when one bit of 8-bit is a 'phi¦phi¦phi¦phi', the sub receiver B applies fire display. All eight transmission lines W are not opened nor short-circuited, then even if a fire breaks out, a fire confirming signal required at minimum is transferred from the main receiver A to the sub receiver B even when short-circuit or open wire exists in part of the transmission lines W without mis-information to apply display or alarm.
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