JPH0344951U - - Google Patents
Info
- Publication number
- JPH0344951U JPH0344951U JP10515989U JP10515989U JPH0344951U JP H0344951 U JPH0344951 U JP H0344951U JP 10515989 U JP10515989 U JP 10515989U JP 10515989 U JP10515989 U JP 10515989U JP H0344951 U JPH0344951 U JP H0344951U
- Authority
- JP
- Japan
- Prior art keywords
- flag
- transmission line
- transmission
- disconnection
- monitors
- 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.)
- Granted
Links
- 230000005540 biological transmission Effects 0.000 claims description 9
- 238000001514 detection method Methods 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 3
Description
第１図は本考案の一実施例の構成を示すブロツ
ク図、第２図は第１図の各部の信号を示すタイム
チヤート、第３図は二重化ループ式データ伝送シ
ステムを示すブロツク図、第４図は従来のシステ
ムの要部を示すブロツク図である。
１……受信部、２……フラグ検出部、３……ワ
ンシヨツト回路、４……継続監視部、５……フリ
ツプフロツプ。
FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention, FIG. 2 is a time chart showing signals of each part in FIG. 1, FIG. 3 is a block diagram showing a duplex loop data transmission system, and FIG. The figure is a block diagram showing the main parts of a conventional system. DESCRIPTION OF SYMBOLS 1... Receiving section, 2... Flag detection section, 3... One-shot circuit, 4... Continuation monitoring section, 5... Flip-flop.
Claims (1)
に接続し、伝送路に周期的にフラグを伝送し、各
局にてフラグを検出し、フラグの検出を監視する
ことにより伝送路の断線を監視し、伝送路の断線
が検出された場合は伝送経路を切り替えてデータ
伝送を継続する装置において、 受信信号からフラグを検出するフラグ検出部と
、 フラグ検出部によりフラグが検出されている時
間を監視し、この時間が一定時間継続する場合に
、伝送路が接続されていると判断する接続監視部
と を設けたことを特徴とするループ式データ伝送装
置。[Claim for Utility Model Registration] Connecting multiple stations in a loop through a duplicated transmission line, periodically transmitting a flag to the transmission line, detecting the flag at each station, and monitoring the detection of the flag. In a device that monitors the transmission line for disconnection and, if a disconnection of the transmission line is detected, switches the transmission route and continues data transmission, the flag detection unit detects the flag from the received signal, and the flag detection unit detects the flag. 1. A loop data transmission device comprising: a connection monitoring unit that monitors the detected time and determines that the transmission path is connected when the detected time continues for a certain period of time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989105159U JPH0735470Y2 (en) | 1989-09-07 | 1989-09-07 | Loop type data transmission device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989105159U JPH0735470Y2 (en) | 1989-09-07 | 1989-09-07 | Loop type data transmission device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0344951U true JPH0344951U (en) | 1991-04-25 |
| JPH0735470Y2 JPH0735470Y2 (en) | 1995-08-09 |
Family
ID=31653929
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989105159U Expired - Fee Related JPH0735470Y2 (en) | 1989-09-07 | 1989-09-07 | Loop type data transmission device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0735470Y2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6251852A (en) * | 1985-08-31 | 1987-03-06 | Toshiba Electric Equip Corp | Transmission line switching device |
| JPS63246947A (en) * | 1987-04-01 | 1988-10-13 | Brother Ind Ltd | Disconnecting line detector in local area network |
-
1989
- 1989-09-07 JP JP1989105159U patent/JPH0735470Y2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6251852A (en) * | 1985-08-31 | 1987-03-06 | Toshiba Electric Equip Corp | Transmission line switching device |
| JPS63246947A (en) * | 1987-04-01 | 1988-10-13 | Brother Ind Ltd | Disconnecting line detector in local area network |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0735470Y2 (en) | 1995-08-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |