Polling system remote supervising and controlling equipment

Abstract

Abstract PURPOSE:To improve the transmission efficiency by allowing a master station to supervise the level reduction of a transmission line to which information is transmitted from a slave station at all times to reduce waiting time for a demodulator of the master station when the slave station transmits the information. CONSTITUTION:The transmission information from the master station is a synchronizing pattern, a synchronism pattern discriminating circuit 10 requests the decision of a command received in succession to a command deciding circuit 11. The command deciding circuit 11 decides the command from the master station transmitted successively and when the command is a command to the own station, the circuit 11 outputs a line switch closing command to a line switch control circuit 7, a reception command is given to a data processor 1, and when a reception command is not to the own station, the circuit 11 outputs a line switch open command to the line switch control circuit 7. The data processor inputted with the reception command to the own station from the command deciding circuit 11 outputs slave station information to a transmission line via a PS converter 2, a modulator 4 and a line switch 6 on the condition of the end of line switch closing from the line switch control circuit 7.

Inventors

• 👤 Yoshiyuki Akeda
• 👤 明田　芳幸

Bibliographic Details