| 摘要 |
PURPOSE:To attain stable reception even if noises are superimposed by transmitting a signal to reset a Schmitt circuit before a master station equipment transmits a prescribed remote signal. CONSTITUTION:A transmission processing circuit 11 of the master station equipment 10 commands the transmission of a reset signal to a reset signal generating circuit 12. The circuit 12 transmits the reset signal to a slave station equipment 30-1 via a transmission interface circuit 13 and a transmission line 20. When the reset signal from the device 10 is received by a differentiation circuit 32 via a reception interface circuit 31, the circuit 32 converts the signal into a bipolar trigger pulse signal and outputs it to the Schmitt circuit 33. When the reset signal is inputted to the circuit 33, the circuit 33 changes the state of the system into the reception enable state even when the circuit 33 is inverted into the reception disable by the noise in the transmission line 20.
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