JPS58111551U - Loop data transmission device - Google Patents
Loop data transmission deviceInfo
- Publication number
- JPS58111551U JPS58111551U JP863382U JP863382U JPS58111551U JP S58111551 U JPS58111551 U JP S58111551U JP 863382 U JP863382 U JP 863382U JP 863382 U JP863382 U JP 863382U JP S58111551 U JPS58111551 U JP S58111551U
- Authority
- JP
- Japan
- Prior art keywords
- data
- serial
- transmission
- circuit
- transmission driver
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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
第１図はループ式伝送系に適用される従来のステーショ
ンの構成を示す具体的なブロック構成図、第２図は本考
案による一実施例を示すステーションと伝送ライン監視
回路との具体的なブロック構成図である。
１はシリアル回線、２〜２ｎはステーション、３１〜３
２及び８４は送信ドライバー、４は送信回路、５〜８□
は受信レシーバ−１６は受信回路、７は切換スイ゛イチ
、８は伝送ライン監視回路、８□はＯＮ故障検出回邸、
８３はドライバー切換制御回路。FIG. 1 is a concrete block configuration diagram showing the configuration of a conventional station applied to a loop transmission system, and FIG. 2 is a concrete block diagram of a station and a transmission line monitoring circuit showing an embodiment of the present invention. FIG. 1 is a serial line, 2~2n are stations, 31~3
2 and 84 are transmission drivers, 4 is a transmission circuit, 5 to 8□
16 is a receiving circuit, 7 is a changeover switch, 8 is a transmission line monitoring circuit, 8□ is an ON failure detection circuit,
83 is a driver switching control circuit.
Claims (1)
受信レシーバ−と、シリアルデータをパラレルデータに
直列並列変換する受信回路と、入力されるパラレルデー
タ群より所望とするデータのみを取込んで機器を操作す
る端末機器を含んだ制御装置と、この装置より出力され
るデータ群をシリアルデータに並列直列変換する送信回
路と、シリアルデータをシリアル回線側え送信する常用
と予備用の２組の送信ドライバーと、前記受信回路より
導びかれる切換指令を基に常用の送信ドライバーより予
備用の送信ドライバー（又は予備用の送信ドライバーよ
り常用の送信ドライバー）えと切換える切換スイッチと
をそれぞれ具備する複数のステーションと、設定の周期
でシリアル回線よりデータを取込み、この受信データの
“データ有り″の送信時間を検出して基準時間と比較し
、−異常である旨を判定した場合のみ予め定められたパ
ターンに従ってステーションを順次選択して、該選択し
たステーションに切換指令信号を送信して当該ステーシ
ョンの送信ドライバーを切換えさせ、切換え直後のシリ
アル回線より取込んだデータを基に当該ステーションの
異常の有無を判定して、異常の場合のみ下流のステーシ
ョンに対して順次切換指令信号を送信する伝送ライン監
視回路とで構成したことを特徴とするループ状データ伝
送装置。A receiver receives serial data transmitted from a serial circuit, a receiver circuit converts the serial data into parallel data, and a receiver receives only the desired data from the input parallel data group to operate the device. A control device including a terminal device, a transmission circuit that converts the data group output from this device into serial data in parallel to serial data, and two sets of transmission drivers, one for regular use and one for backup, that transmit serial data over a serial line. a plurality of stations each equipped with a changeover switch that switches from a regular transmission driver to a backup transmission driver (or from a backup transmission driver to a regular transmission driver) based on a switching command derived from the receiving circuit; Data is fetched from the serial line at a cycle of A switching command signal is sent to the selected station to switch the transmission driver of the station, and the presence or absence of an abnormality in the station is determined based on the data acquired from the serial line immediately after switching, and the abnormality is detected. 1. A loop data transmission device comprising a transmission line monitoring circuit that sequentially transmits switching command signals to downstream stations only in the case of .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP863382U JPS58111551U (en) | 1982-01-25 | 1982-01-25 | Loop data transmission device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP863382U JPS58111551U (en) | 1982-01-25 | 1982-01-25 | Loop data transmission device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58111551U true JPS58111551U (en) | 1983-07-29 |
Family
ID=30021315
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP863382U Pending JPS58111551U (en) | 1982-01-25 | 1982-01-25 | Loop data transmission device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58111551U (en) |
-
1982
- 1982-01-25 JP JP863382U patent/JPS58111551U/en active Pending
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