| 摘要 |
PURPOSE:To further improve safety by a method wherein a supervising circuit for resetting a microcomputer within a base unit is arranged when no transmis sion of data is performed, a reset cancelling signal is generated from a micro computer within a remote unit after turning on an operation switch again and a reset condition of the microcomputer within the base unit is cancelled. CONSTITUTION:When an operation switch 35 is turned off, supplying of power to a remote unit 30 is stopped and a transmission of data from a remote unit 30 is not carried out. Therefore, a received data supervising circuit 19 generates a reset signal Sr and a microcomputer 11 is reset and waits an instruction. When an operation switch 35 is turned on again and as a result a reset cancelling signal is sent from a microcomputer 31 at a remote unit 30 side, a receiving circuit 14 within a base unit detects the signal through a data transmission and power supply line and produces received data 17 including a significant logical reversing signal, so that the received data supervising circuit 19 detects the data and cancels a reset signal Sr. |
