JP3062127B2 - Magnetic tape device with automatic storage and method of detecting cable connection status thereof - Google Patents
Magnetic tape device with automatic storage and method of detecting cable connection status thereofInfo
- Publication number
- JP3062127B2 JP3062127B2 JP9199718A JP19971897A JP3062127B2 JP 3062127 B2 JP3062127 B2 JP 3062127B2 JP 9199718 A JP9199718 A JP 9199718A JP 19971897 A JP19971897 A JP 19971897A JP 3062127 B2 JP3062127 B2 JP 3062127B2
- Authority
- JP
- Japan
- Prior art keywords
- cable
- control signal
- transfer mechanism
- magnetic tape
- detecting
- 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.)
- Expired - Fee Related
Links
Landscapes
- Automatic Tape Cassette Changers (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、自動保管庫付き
磁気テープ装置に関し、特にケーブルが抜けているか接
続されているかを検出する機能を有する自動保管庫付き
磁気テープ装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic tape device with an automatic storage, and more particularly to a magnetic tape device with an automatic storage having a function of detecting whether a cable is disconnected or connected.
【０００２】[0002]
【従来の技術】従来の自動保管庫付き磁気テープ装置
は、制御部と移送機構を電気的に接続するケーブルの接
続状況を検出するのに、それ専用にケーブルの線を使用
していたので、ケーブルの線の数が増えるという問題点
があった。2. Description of the Related Art A conventional magnetic tape device with an automatic storage uses a dedicated cable line to detect a connection state of a cable for electrically connecting a control unit and a transfer mechanism. There was a problem that the number of cable lines increased.
【０００３】また、例えば、特開平５−１５３６１５号
公報に記載の発明のようにケーブルの線数を増やさずに
ケーブルの接続状況を検出するというアイディアがある
が、特開平５−１５３６１５号公報に記載の発明は、信
号の送信側でケーブルの接続状況を検出するものではな
い。Further, for example, there is an idea of detecting the connection state of a cable without increasing the number of cables as disclosed in Japanese Patent Application Laid-Open No. 5-153615. The described invention does not detect the connection status of the cable on the signal transmission side.
【０００４】[0004]
【発明が解決しようとする課題】上述したように従来の
自動保管庫付き磁気テープ装置では、信号送出側がケー
ブルの抜け・接続を検出するのに、検出専用の線を追加
しなければならないため、ケーブル本数が多くなるとい
う問題点があった。As described above, in the conventional magnetic tape device with automatic storage, a line dedicated to detection must be added for the signal sending side to detect disconnection or connection of the cable. There was a problem that the number of cables increased.
【０００５】この発明の目的は、ケーブルの本数を増や
すことなくケーブルの接続状況を信号の送信側にて検出
することで、装置の小型化を計ることのできる自動保管
庫付き磁気テープ装置を提供することにある。An object of the present invention is to provide a magnetic tape device with an automatic storage, which can reduce the size of the device by detecting the connection state of the cable on the signal transmitting side without increasing the number of cables. Is to do.
【０００６】[0006]
【課題を解決するための手段】この発明の自動保管庫付
き磁気テープ装置は、移送機構と制御部のケーブルの接
続状況を電流の有無により検出する。より具体的には、
伝送路の電流を検出する電流検出器と、電圧比較器と、
論理矛盾判断器と、タイマー回路を有する。SUMMARY OF THE INVENTION A magnetic tape device with an automatic storage according to the present invention detects the connection status of a cable between a transfer mechanism and a control unit based on the presence or absence of an electric current. More specifically,
A current detector for detecting the current of the transmission line, a voltage comparator,
It has a logic contradiction determiner and a timer circuit.
【０００７】この発明は、制御部から送出する制御信号
と、移送機構へ制御信号を伝達するためにケーブルを経
由して流れる電流の有無を検出した結果とを比較し、そ
の論理に矛盾がないかを判断する。ケーブルが抜けてい
る場合、この論理に矛盾が生じるため、ケーブルの接続
状況が検出できる。According to the present invention, a control signal transmitted from a control unit and a cable for transmitting the control signal to a transfer mechanism are transmitted through a cable.
The result is compared with the result of detection of the presence or absence of the current flowing therethrough, and it is determined whether the logic is consistent. If the cable is disconnected, a contradiction occurs in this logic, and the connection state of the cable can be detected.
【０００８】また、制御部から送出する制御信号と、移
送機構へ制御信号を伝達するためにケーブルを経由して
流れる電流においては、時間のずれが生じるため、タイ
マー回路においてそのずれを吸収することにより、誤検
出を防止できる。Also, a control signal transmitted from the control unit and a transfer
Via a cable to transmit control signals to the transmission mechanism
Since a time lag occurs in the flowing current, erroneous detection can be prevented by absorbing the time lag in the timer circuit.
【０００９】[0009]
【発明の実施の形態】次に、この発明の第１の実施の形
態について図面を参照して説明する。Next, a first embodiment of the present invention will be described with reference to the drawings.
【００１０】図１は、この発明の第１の実施の形態を示
す回路構成図である。図１に示す自動保管庫付き磁気テ
ープ装置は、制御部１、移送機構２、ケーブル３、フォ
トカプラ４、電流検出抵抗５、電圧比較器６、論理矛盾
判断器７、タイマー回路８、信号ドライバ９により構成
されている。FIG. 1 is a circuit diagram showing a first embodiment of the present invention. The magnetic tape device with an automatic storage shown in FIG. 1 includes a control unit 1, a transfer mechanism 2, a cable 3, a photocoupler 4, a current detection resistor 5, a voltage comparator 6, a logical inconsistency determiner 7, a timer circuit 8, a signal driver. 9.
【００１１】制御部１より発生した制御信号は、信号ド
ライバ９を駆動することにより、ケーブル３を電流が流
れ、移送機構２に伝達され、フォトカプラ４を駆動す
る。この時、電流検出抵抗５を電流が流れることによ
り、図中ａ点の電圧は基準電圧より低い値になり、電圧
比較器６の出力が反転するので、論理矛盾判断器７は、
制御信号との間に矛盾はないと判断する。A control signal generated by the control unit 1 drives a signal driver 9, so that a current flows through the cable 3 and is transmitted to the transfer mechanism 2 to drive the photocoupler 4. At this time, when a current flows through the current detection resistor 5, the voltage at point a in the figure becomes lower than the reference voltage, and the output of the voltage comparator 6 is inverted.
It is determined that there is no contradiction with the control signal.
【００１２】ここで、ケーブル３が抜けている場合は、
制御部１より発生した制御信号が、信号ドライバ９を駆
動しても、電流検出抵抗５を電流が流れないので、図中
ａ点の電圧は基準電庄より高くなり、電圧比較器８の出
力が反転しないため、論理矛盾判断器７は、制御信号と
の間に矛盾があると判断する。このことにより、ケーブ
ルの接続状況を検出することができる。Here, when the cable 3 is disconnected,
Even if the control signal generated by the control unit 1 drives the signal driver 9, no current flows through the current detection resistor 5, so that the voltage at point a in the figure becomes higher than the reference voltage, and the output of the voltage comparator 8 Are not inverted, the logical contradiction determiner 7 determines that there is a contradiction with the control signal. Thus, the connection state of the cable can be detected.
【００１３】また、制御部１より発生した制御信号が、
信号ドライバ９を駆動してから電流検出抵抗５に電流が
流れ、電圧比較器６の出力が反転するまで時間の遅れを
タイマー回路８により吸収する。このことにより、誤検
出を防止することができる。The control signal generated by the control unit 1 is:
After the signal driver 9 is driven, a current flows through the current detection resistor 5, and the timer circuit 8 absorbs a time delay until the output of the voltage comparator 6 is inverted. Thereby, erroneous detection can be prevented.
【００１４】次に、この発明の第２の実施の形態につい
て図面を参照して説明する。Next, a second embodiment of the present invention will be described with reference to the drawings.
【００１５】図２は、この発明の第２の実施の形態を示
す回路構成図である。図２に示す自動保管庫付き磁気テ
ープ装置は、制御部１、移送機構２、ケーブル３、信号
レシーバ１０、電流検出抵抗５、電圧比較器６、論理矛
盾判断器７、タイマー回路８、信号ドライバ９により構
成されている。FIG. 2 is a circuit diagram showing a second embodiment of the present invention. The magnetic tape device with automatic storage shown in FIG. 2 includes a control unit 1, a transfer mechanism 2, a cable 3, a signal receiver 10, a current detection resistor 5, a voltage comparator 6, a logic inconsistency determiner 7, a timer circuit 8, a signal driver. 9.
【００１６】制御部１より発生した制御信号は、信号ド
ライバ９を駆動することにより、ケーブル３を電流が流
れ、移送機構２に伝達され、信号レシーバ１０を駆動す
る。この時、電流検出抵抗５を電流が流れることによ
り、図中ａ点の電圧は基準電圧より低い値になり、電庄
比較器６の出力が反転するので、論理矛盾判断器７は、
制御信号との間に矛盾はないと判断する。The control signal generated by the control unit 1 drives the signal driver 9 so that a current flows through the cable 3 and is transmitted to the transfer mechanism 2 to drive the signal receiver 10. At this time, when a current flows through the current detection resistor 5, the voltage at point a in the figure becomes lower than the reference voltage, and the output of the voltage comparator 6 is inverted.
It is determined that there is no contradiction with the control signal.
【００１７】ここで、ケーブル３が抜けている場合は、
制御部１より発生した制御信号が、信号ドライバ９を駆
動しても、電流検出抵抗５を電流が流れないので、図中
ａ点の電圧は基準電圧より高くなり、電圧比較器６の出
力が反転しないため、論理矛盾判断器７は、制御信号と
の間に矛盾があると判断する。このことにより、ケーブ
ルの接続状況を検出することができる。Here, when the cable 3 is disconnected,
Even if the control signal generated by the control unit 1 drives the signal driver 9, no current flows through the current detection resistor 5, so that the voltage at the point a in the figure becomes higher than the reference voltage, and the output of the voltage comparator 6 becomes Since it is not inverted, the logical contradiction determiner 7 determines that there is a contradiction with the control signal. Thus, the connection state of the cable can be detected.
【００１８】また、制御部１より発生した制御信号が、
信号ドライバ９を騒動してから電流検出抵抗５に電流が
流れ、電圧比較器６の出力が反転するまで時間の遅れを
タイマー回路８により吸収する。このことにより、誤検
出を防止することができる。The control signal generated by the control unit 1 is:
After the signal driver 9 is disturbed, a current flows through the current detection resistor 5 and a time delay until the output of the voltage comparator 6 is inverted is absorbed by the timer circuit 8. Thereby, erroneous detection can be prevented.
【００１９】[0019]
【発明の効果】以上説明したように、この発明は、電流
検出器を使用してケーブルに流れる電流を検出すること
によりケーブルの接続を検出するため、ケーブルの線を
増やすことがなく信号送信側でケーブルの接続状況を検
出することができるという効果を有する。As described above, according to the present invention, since the connection of the cable is detected by detecting the current flowing through the cable using the current detector, the signal transmission side can be provided without increasing the number of cables. Has the effect of detecting the connection status of the cable.
【００２０】また、この発明は、タイマー回路により伝
送の時間連れを吸収するために伝送の時間遅れによる誤
検出を防止することができるという効果を有する。Further, the present invention has an effect that an erroneous detection due to a time delay of transmission can be prevented since a time delay of transmission is absorbed by a timer circuit.
【図１】この発明の第１の実施の形態を示す回路構成図
である。FIG. 1 is a circuit configuration diagram showing a first embodiment of the present invention.
【図２】この発明の第２の実施の形態を示す回路構成図
である。FIG. 2 is a circuit diagram showing a second embodiment of the present invention.
１ 制御部 ２ 移送機構 ３ ケーブル ４ フォトカプラ ５ 電流検出抵抗 ６ 電圧比較器 ７ 論理矛盾判断器 ８ タイマー回路 ９ 信号ドライバ １０ 信号レシーバ DESCRIPTION OF SYMBOLS 1 Control part 2 Transfer mechanism 3 Cable 4 Photocoupler 5 Current detection resistor 6 Voltage comparator 7 Logic inconsistency judgment device 8 Timer circuit 9 Signal driver 10 Signal receiver
Claims (5)
検出する機能を有する自動保管庫付き磁気テープ装置に
おいて、 前記移送機構は、制御信号によって駆動されるフォトカ
プラを備え、 前記制御部は、制御信号を送出する信号ドライバと、 前記移送機構へ制御信号を伝達するためにケーブルを経
由して流れる電流を検出する電流検出器と、 前記電流検出器に前記電流が流れることによる電圧を基
準電圧と比較する電圧比較器と、 前記電圧比較器の比較結果と制御信号との間に矛盾がな
いかを判断する論理矛盾判断器と、 を備えることを特徴とする自動保管庫付き磁気テープ装
置。1. A magnetic tape device with an automatic storage having a function of detecting a connection state of a cable between a transfer mechanism and a control unit, wherein the transfer mechanism includes a photocoupler driven by a control signal; A signal driver for transmitting a control signal, a current detector for detecting a current flowing through a cable for transmitting the control signal to the transfer mechanism, and a voltage based on the current flowing through the current detector. A magnetic tape device with an automatic storage, comprising: a voltage comparator for comparing with a voltage; and a logical contradiction determiner for determining whether there is any contradiction between the comparison result of the voltage comparator and the control signal. .
検出する機能を有する自動保管庫付き磁気テープ装置に
おいて、 前記移送機構は、制御信号によって駆動される信号レシ
ーバを備え、 前記制御部は、制御信号を送出する信号ドライバと、 前記移送機構へ制御信号を伝達するためにケーブルを経
由して流れる電流を検出する電流検出器と、 前記電流検出器に前記電流が流れることによる電圧を基
準電圧と比較する電圧比較器と、 前記電圧比較器の比較結果と制御信号との間に矛盾がな
いかを判断する論理矛盾判断器と、 を備えることを特徴とする自動保管庫付き磁気テープ装
置。2. A magnetic tape device with an automatic storage device having a function of detecting a connection state of a cable between a transfer mechanism and a control unit, wherein the transfer mechanism includes a signal receiver driven by a control signal; A signal driver for transmitting a control signal, a current detector for detecting a current flowing through a cable for transmitting the control signal to the transfer mechanism, and a voltage based on the current flowing through the current detector. A magnetic tape device with an automatic storage, comprising: a voltage comparator for comparing with a voltage; and a logical contradiction determiner for determining whether there is any contradiction between the comparison result of the voltage comparator and the control signal. .
移送機構へ制御信号を伝達するためにケーブルを経由し
て流れる電流の時間のずれをタイマー回路において吸収
することを特徴とする請求項１または２に記載の自動保
管庫付き磁気テープ装置。3. A timer circuit for absorbing a time lag between a control signal sent from the control unit and a current flowing through a cable for transmitting the control signal to the transfer mechanism. 3. The magnetic tape device with an automatic storage according to 1 or 2.
検出する機能を有する自動保管庫付き磁気テープ装置の
ケーブル接続状況検出方法において、 前記制御部から送出する制御信号と、前記移送機構へ制
御信号を伝達するためにケーブルを経由して流れる電流
の有無を検出した結果とを比較し、その論理に矛盾がな
いかを判断することにより、ケーブルの接続状況を検出
することを特徴とするケーブル接続状況検出方法。4. A method for detecting a cable connection status of a magnetic tape device with an automatic storage having a function of detecting a connection status of a cable between a transfer mechanism and a control unit, the control signal being sent from the control unit and the control signal being transmitted to the transfer mechanism. The connection state of the cable is detected by comparing the result of detecting the presence or absence of a current flowing through the cable to transmit a control signal and determining whether there is any inconsistency in the logic. Cable connection status detection method.
移送機構へ制御信号を伝達するためにケーブルを経由し
て流れる電流の時間のずれをタイマー回路において吸収
することを特徴とする請求項４に記載のケーブル接続状
況検出方法。5. A timer circuit for absorbing a time lag between a control signal sent from the control unit and a current flowing through a cable for transmitting the control signal to the transfer mechanism. 4. The method for detecting a cable connection status according to 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9199718A JP3062127B2 (en) | 1997-07-25 | 1997-07-25 | Magnetic tape device with automatic storage and method of detecting cable connection status thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9199718A JP3062127B2 (en) | 1997-07-25 | 1997-07-25 | Magnetic tape device with automatic storage and method of detecting cable connection status thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1145546A JPH1145546A (en) | 1999-02-16 |
| JP3062127B2 true JP3062127B2 (en) | 2000-07-10 |
Family
ID=16412465
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9199718A Expired - Fee Related JP3062127B2 (en) | 1997-07-25 | 1997-07-25 | Magnetic tape device with automatic storage and method of detecting cable connection status thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3062127B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5134037B2 (en) * | 2010-04-27 | 2013-01-30 | レノボ・シンガポール・プライベート・リミテッド | Information device capable of reducing standby power and power control method |
-
1997
- 1997-07-25 JP JP9199718A patent/JP3062127B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH1145546A (en) | 1999-02-16 |
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