JPH04243328A - Transmission line changeover circuit - Google Patents
Transmission line changeover circuitInfo
- Publication number
- JPH04243328A JPH04243328A JP3004084A JP408491A JPH04243328A JP H04243328 A JPH04243328 A JP H04243328A JP 3004084 A JP3004084 A JP 3004084A JP 408491 A JP408491 A JP 408491A JP H04243328 A JPH04243328 A JP H04243328A
- Authority
- JP
- Japan
- Prior art keywords
- transmission line
- alarm information
- circuit
- transmission
- information
- 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
- 230000005540 biological transmission Effects 0.000 title claims abstract description 57
- 230000002159 abnormal effect Effects 0.000 claims description 11
- 230000003111 delayed effect Effects 0.000 abstract 1
- 230000005856 abnormality Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 1
Landscapes
- Hardware Redundancy (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、伝送路切替回路に関し
、特に２重化された伝送路からの信号の一方を伝送装置
本体に送出する伝送路切替回路に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmission line switching circuit, and more particularly to a transmission line switching circuit that sends one of the signals from a duplicated transmission line to the main body of a transmission device.
【０００２】0002
【従来の技術】図２は従来の伝送路切替回路の一例のブ
ロック図である。2. Description of the Related Art FIG. 2 is a block diagram of an example of a conventional transmission line switching circuit.
【０００３】共通部２ａは、接続される終端盤０ａ，１
ａの実装情報をグランド（アース）線Ｅにより検出して
いる。図２において、共通部２ａに終端盤１ａが接続実
装され、終端盤０ａが未実装であると、終端盤１ａの警
報情報送出回路１２ａが伝送路１０１の異常により警報
情報を送出している場合でも系選択回路２３ａは終端盤
１ａを選択し、伝送路１０１から終端回路１３ａを介し
て送られてきた信号を伝送路１０２で伝送装置本体に送
出する。この状態で異常の伝送路１００に接続される終
端盤０ａを実装すると、警報情報送出回路０２ａが伝送
路１００の異常により警報情報を送出するが、この警報
情報より先に実装されたという実装情報がグランド線Ｅ
により選択送出回路２１ａに伝達されるので、系選択回
路２３ａは終端盤０ａが異常なしで実装されたと判断し
、伝送路１００から終端回路０３ａを介して送られてき
た信号を伝送路１０２に送出することになり、両方の伝
送路１００，１０１に共に異常であるのに終端盤１ａを
終端盤０ａに切り替える動作を行う。[0003] The common part 2a is connected to the terminal boards 0a and 1.
Mounting information of a is detected by a ground (earth) wire E. In FIG. 2, when the termination board 1a is connected and mounted to the common part 2a and the termination board 0a is not mounted, the alarm information sending circuit 12a of the termination board 1a is sending out alarm information due to an abnormality in the transmission line 101. However, the system selection circuit 23a selects the termination board 1a, and sends the signal sent from the transmission line 101 via the termination circuit 13a to the transmission apparatus main body through the transmission line 102. If the termination board 0a connected to the abnormal transmission line 100 is mounted in this state, the alarm information sending circuit 02a will send out alarm information due to the abnormality of the transmission line 100, but implementation information indicates that the terminal board 0a was installed before this alarm information. is ground wire E
Since the signal is transmitted to the selective sending circuit 21a, the system selecting circuit 23a determines that the termination board 0a has been mounted without any abnormality, and sends the signal sent from the transmission line 100 via the termination circuit 03a to the transmission line 102. Therefore, even though both transmission lines 100 and 101 are abnormal, an operation is performed to switch the termination board 1a to the termination board 0a.
【０００４】0004
【発明が解決しようとする課題】上述した従来の伝送路
切替回路は、２重化された終端盤に入力される伝送路の
両方が異常の場合に後から実装された終端盤の伝送路が
異常なしと判断され、終端盤の切り替え動作が行われる
ので、伝送装置本体を含めて動作が不安定になるという
問題がある。[Problems to be Solved by the Invention] The conventional transmission line switching circuit described above has a problem in that when both of the transmission lines input to the duplex termination board are abnormal, the transmission line of the termination board installed later is Since it is determined that there is no abnormality and the switching operation of the terminal board is performed, there is a problem that the operation including the transmission apparatus main body becomes unstable.
【０００５】[0005]
【課題を解決するための手段】本発明の伝送路切替回路
は、２重化された伝送路からの信号が異常のとき警報情
報を出力する手段と供給された電源により実装情報を出
力する手段とをそれぞれ備えた第１と第２の終端盤と、
前記警報情報と前記実装情報とが同時に入力されたとき
前記警報情報を優先して出力する手段と前記警報情報が
出力された第１の終端盤を前記警報情報が出力されてい
ない第２の終端盤に切り替える手段と前記第２の終端盤
の前記伝送路からの信号を出力する手段とを備えた共通
部とを有する。[Means for Solving the Problems] The transmission line switching circuit of the present invention has a means for outputting alarm information when a signal from a duplicated transmission line is abnormal, and a means for outputting mounting information using a supplied power source. first and second terminal boards each having a
means for outputting the alarm information with priority when the alarm information and the implementation information are input simultaneously; and means for connecting the first terminal board to which the alarm information is output to a second terminal board to which the alarm information is not output. and a common section including means for switching to a board and means for outputting a signal from the transmission line of the second terminal board.
【０００６】[0006]
【実施例】次に、本発明について図面を参照して説明す
る。図１は本発明の一実施例のブロック図である。DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be explained with reference to the drawings. FIG. 1 is a block diagram of one embodiment of the present invention.
【０００７】本実施例は、２重化された伝送路１００，
１０１からの信号が異常のとき警報情報を出力する警報
情報送出回路０１，１１と、供給された電源により実装
情報を出力する実装情報送出回路０２，１２とを備えた
２組の第１と第２の終端盤０，１と、警報情報と実装情
報とが同時に入力されたとき警報情報を優先して出力す
る選択送出回路２１，２２と警報情報が出力された第１
の終端盤０を警報情報が出力されてない第２の終端盤１
に切り替え、第２の終端盤１に入力の伝送路１０１の信
号を出力する系選択回路２３とを備えた共通部２とを有
して構成される。[0007] In this embodiment, a duplex transmission line 100,
Two sets of first and second alarm information sending circuits 01 and 11 that output alarm information when the signal from 101 is abnormal, and mounting information sending circuits 02 and 12 that output mounting information using the supplied power. 2 terminal boards 0 and 1, selective sending circuits 21 and 22 that output alarm information with priority when alarm information and mounting information are input at the same time, and a first terminal board to which alarm information is output.
The terminal board 0 is the second terminal board 1 to which no alarm information is output.
The common section 2 includes a system selection circuit 23 that switches to the input transmission line 101 and outputs the signal of the input transmission line 101 to the second terminal board 1.
【０００８】次に本実施例の動作について説明すると、
２重化された２本の伝送路１００，１０１に対してそれ
ぞれ終端盤０，１が接続されている。伝送路１００，１
０１から入力される信号は終端回路０３，１３を通りそ
れぞれ共通部２の系選択回路２３へ送られる。共通部２
は、実装情報送出回路０１からの実装情報及び警報情報
送出回路０２からの警報情報のうち、警報情報を優先し
て選択する選択送出回路２１及び終端盤１の実装情報送
出回路１１からの実装情報及び警報情報送出回路１２か
らの警報情報のうち警報情報を優先して送出する選択送
出回路２２からの情報をもとに終端回路０３から系選択
回路２３に対して送られてきた信号と終端回路１３から
送られてきた信号の一方を選択し伝送路１０２で伝送装
置本体に送出する。Next, the operation of this embodiment will be explained.
Terminal boards 0 and 1 are connected to two duplex transmission lines 100 and 101, respectively. Transmission line 100,1
The signals inputted from the terminal 01 are sent to the system selection circuit 23 of the common section 2 through the termination circuits 03 and 13, respectively. Common area 2
is the mounting information from the mounting information sending circuit 11 of the terminal board 1 and the selection sending circuit 21 which prioritizes and selects alarm information from the mounting information from the mounting information sending circuit 01 and the alarm information from the alarm information sending circuit 02. and the signal sent from the termination circuit 03 to the system selection circuit 23 based on the information from the selection transmission circuit 22 which sends out alarm information with priority among the alarm information from the alarm information transmission circuit 12 and the termination circuit. One of the signals sent from 13 is selected and sent to the main body of the transmission device via transmission line 102.
【０００９】このようにすると、終端盤０が未実装であ
り、終端盤１が実装され、かつ、伝送路１０１が異常で
警報情報が選択送出回路２２経由で系選択回路２３に送
出されている状態において、異常な伝送路１００の信号
が入力される終端盤０を実装された場合、終端盤０では
供給された電源で動作する実装情報送出回路０１からの
実装情報と警報情報送出回路０２からの警報情報とが同
時に出力され、選択送出回路２１では警報情報を優先し
て送出するので、系選択回路２３では終端盤０，１とも
に伝送路１００，１０１が異常と判断し、切り替え動作
を行わずに終端盤１から伝送路１０１の信号を伝送路１
０２で伝送装置本体に送出するので、伝送装置本体も伝
送路の切り替えに伴う動作が行われない。[0009] In this way, the terminal board 0 is unmounted, the terminal board 1 is mounted, and the transmission line 101 is abnormal and alarm information is sent to the system selection circuit 23 via the selection sending circuit 22. In this state, if the terminal board 0 to which the signal of the abnormal transmission path 100 is input is mounted, the terminal board 0 will receive the mounting information from the mounting information sending circuit 01 which operates with the supplied power and the alarm information sending circuit 02. Since the alarm information is output at the same time, and the selective sending circuit 21 sends out the alarm information with priority, the system selecting circuit 23 determines that the transmission lines 100 and 101 of both terminal boards 0 and 1 are abnormal, and performs a switching operation. Transfer the signal from the transmission line 101 from the termination board 1 to the transmission line 1 without
Since the signal is sent to the transmission device main body at step 02, the transmission device main body also does not perform any operation associated with switching the transmission path.
【００１０】0010
【発明の効果】以上説明したように本発明は、伝送路か
らの信号が異常のとき出力される警報情報と供給された
電源により出力される実装情報とが同時に入力されたと
き警報情報を優先して第１と第２の終端盤の切り替え動
作を行うことにより、１方の伝送路が異常な状態で第１
の終端盤に接続されている場合に、他方の伝送路も異常
な状態で第２の終端盤に接続されたとき、第１と第２の
終端盤の切り替え動作を防止できるので、伝送装置本体
を含む動作が安定化されるという効果がある。[Effects of the Invention] As explained above, the present invention gives priority to the alarm information when the alarm information output when the signal from the transmission path is abnormal and the mounting information output from the supplied power source are input simultaneously. By performing a switching operation between the first and second termination boards, the first transmission line can be
If the other transmission line is also connected to the second termination board in an abnormal state, switching operation between the first and second termination boards can be prevented. This has the effect of stabilizing operations including.
【図１】本発明の一実施例のブロック図、FIG. 1 is a block diagram of an embodiment of the present invention;
【図２】従来
の伝送路切替回路の一例のブロック図である。FIG. 2 is a block diagram of an example of a conventional transmission line switching circuit.
０，１ 終端盤 ２ 共通部 ０１，１１ 実装情報送出回路 ０２，１２ 警報情報送出回路 ２１，２２ 選択送出回路 ２３ 系選択回路 0,1 Terminal board 2 Common parts 01, 11 Mounting information sending circuit 02, 12 Alarm information sending circuit 21, 22 Selective sending circuit 23 System selection circuit
Claims (1)
のとき警報情報を出力する手段と供給された電源により
実装情報を出力する手段とをそれぞれ備えた第１と第２
の終端盤と、前記警報情報と前記実装情報とが同時に入
力されたとき前記警報情報を優先して出力する手段と前
記警報情報が出力された第１の終端盤を前記警報情報が
出力されていない第２の終端盤に切り替える手段と前記
第２の終端盤の前記伝送路からの信号を出力する手段と
を備えた共通部とを有することを特徴とする伝送路切替
回路。[Claim 1] First and second channels each comprising means for outputting alarm information when the signal from the duplicated transmission line is abnormal, and means for outputting mounting information using a supplied power source.
a terminal board, means for outputting the alarm information with priority when the alarm information and the mounting information are input simultaneously, and a first terminal board to which the alarm information is output; 1. A transmission path switching circuit comprising: a common section including means for switching to a second termination board that is not connected to the transmission path; and means for outputting a signal from the transmission path of the second termination board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3004084A JPH04243328A (en) | 1991-01-18 | 1991-01-18 | Transmission line changeover circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3004084A JPH04243328A (en) | 1991-01-18 | 1991-01-18 | Transmission line changeover circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04243328A true JPH04243328A (en) | 1992-08-31 |
Family
ID=11574921
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3004084A Pending JPH04243328A (en) | 1991-01-18 | 1991-01-18 | Transmission line changeover circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04243328A (en) |
-
1991
- 1991-01-18 JP JP3004084A patent/JPH04243328A/en active Pending
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