| 摘要 |
PURPOSE:To attain the control simply, surely and inexpensively without much provisions of the hardware and the software, by detecting an interface signal which is transmitted from a remote device to an MODEM and discriminating the leading of the remote device. CONSTITUTION:A rotary switching control section CHG switches a switching section SW to the position B when no control signal is given from a microcomputer MPU at first. The power supply given from a central controller to a remote device RMC enters an MODEM control section MCT via the MODEM MDM, the switch B position and a bus 1. When a return signal from the MODEM MDM is received to the MCT, a line between the central controller and the power supply application device is connected and a power supply applying command is given to the microcomputer MPU, which interpretes this command. When the remote device RMC rises, the interface signal is generated from a communication control adaptor CMC to the MODEM MDM. |
