| 摘要 |
PURPOSE:To attain high speed response, by dividing a plurality of slave devices into groups, and performing callout from a master device in different time at each group. CONSTITUTION:Signals are received and transmitted by superimposing a pulse- modulated-carrier on a lighting line 1. The callout for the provision of an instruction to salve devices is executed with the control of a microprocessor 7 by operating an operating panel 9, and the signal is transmitted to the line 1 via a transmitter 8 and a transmission reception switching device 4. The callout from the master device is executed for each group and the response of each group is performed before the callout of the next group. This response is applied to the microprocessor 7 via the device 4, an amplifier 6, and a wave shape circuit 6. The microprocessor 7 displays the callout and response on a display panel 10 through the response. The callout is executed individually and with multiple address. |
