JPS58144980U

JPS58144980U - Line switching device for remote monitoring and control equipment

Info

Publication number: JPS58144980U
Application number: JP3943182U
Authority: JP
Inventors: 西崎　睦夫
Original assignee: 株式会社日立製作所
Priority date: 1982-03-23
Filing date: 1982-03-23
Publication date: 1983-09-29

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は回線二重化遠方監視制御装置の構成図、第２図
は従来の制御回線切換回路図、第３図は第２図のタイム
チャート、第４図は本考案の一実施例の切換条件構成回
路図、第５図は本考案の他の実施例の制御回線切換回路
図、第６図は第５図のタイムチャートである。゛１８・・・Ａ回線断検出リレー、１９・・・８回線断検
出リレー、２０・・・Ａ回線断表示人カリレー、２１・
・・Ｂ回線断表示入カリレー、２２・・・タイマー、２
３・・・使用回線記憶器、２４・・・切換スイッチ、２
５．３１．３２・・・リレーアンプ、２６．２７・・・
アンドゲート、２８・・・リセットスイッチ、２９゜３
０・・・回線断記憶器。Ａ回ｉ１ｊ′６Ｊ回勧参・−（・・λ　　　′ ：１耐（禰析）−−一丁■■柄下ｄ第一５図 ”□ニ第６図Fig. 1 is a configuration diagram of a redundant line remote monitoring and control device, Fig. 2 is a conventional control line switching circuit diagram, Fig. 3 is a time chart of Fig. 2, and Fig. 4 is a switching condition of an embodiment of the present invention. A configuration circuit diagram, FIG. 5 is a control line switching circuit diagram of another embodiment of the present invention, and FIG. 6 is a time chart of FIG. 5.゛18...A line disconnection detection relay, 19...8 line disconnection detection relay, 20...A line disconnection indicator relay, 21.
・・B line disconnection indication input relay, 22 ・・Timer, 2
3...Used line memory device, 24...Selector switch, 2
5.31.32...Relay amplifier, 26.27...
AND gate, 28...reset switch, 29°3
0...Line disconnection memory device. A time i1j'6J Round reference・-(・・λ ′: 1 resistance (Nezai)--Ichicho ■■ Handle d Figure 15"□D Figure 6

Claims

[Scope of utility model registration request]

In a remote monitoring and control device that has a single FS transmitter and receiver and a duplexed transmission line, the transmitting side sends a modulated signal from the FS transmitter to the duplexed transmission line in parallel, and the receiving side sends out a modulated signal in parallel using a switching method. Connect the FS receiver to the line, and if there is an abnormality in the connected line,
A line switching device for a remote monitoring and control device, characterized in that the FS receiver detects a line abnormality, automatically switches to a standby line, and continuously displays which line is abnormal.