| 摘要 |
PURPOSE:To exclude noncoincidence of information stored in every unit, by transmitting a reset instruction when the memory in the main control unit such as button telephone exchange system indicates nonoperating state of each unit to be controlled. CONSTITUTION:After a processor in a main control unit checks the presence of information produced in units SLU1-m and TEU1-n with ''check start'', the processor checks the content of each address corresponding to the units at the memory, resulting that no information is produced for the units. If the content of each address indicates nonoperation, the reset instruction is sequentially transmitted to each unit as the information with ''reset instruction transmission'' to clear the memory in each unit, which is reset. |
