JPH06242858A - Power source controller of shared i/o device - Google Patents
Power source controller of shared i/o deviceInfo
- Publication number
- JPH06242858A JPH06242858A JP5023089A JP2308993A JPH06242858A JP H06242858 A JPH06242858 A JP H06242858A JP 5023089 A JP5023089 A JP 5023089A JP 2308993 A JP2308993 A JP 2308993A JP H06242858 A JPH06242858 A JP H06242858A
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- shared
- power source
- power
- printer
- 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
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Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、パソコンやワークステ
ーション等の複数台のコンピュータとプリンタ等の共有
の入出力装置（以下Ｉ／Ｏ装置とも記す）が接続された
ネットワーク上における共有Ｉ／Ｏ装置の電源のｏｎ／
ｏｆｆを自動的にできる電源制御装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shared I / O on a network to which a plurality of computers such as personal computers and workstations and a shared input / output device (hereinafter also referred to as I / O device) such as a printer are connected. Turn the device power on /
The present invention relates to a power supply control device capable of automatically turning off.
【０００２】なお以下各図において同一の符号は同一も
しくは相当部分を示す。In the following figures, the same reference numerals indicate the same or corresponding parts.
【０００３】[0003]
【従来の技術】図３は従来のこの種のネットワークを持
つシステムの構成例を示す。同図において５はネットワ
ーク、１，２はこのネットワークに接続されたコンピュ
ータ、３はネットワーク５を介してコンピュータ１，２
に共に利用されるプリンタ等の共有Ｉ／Ｏ装置である。
また１ａ，２ａおよび３ａは夫々コンピュータ１，２お
よび共有Ｉ／Ｏ装置３に対する電源の入力線である。2. Description of the Related Art FIG. 3 shows a configuration example of a conventional system having this type of network. In the figure, 5 is a network, 1 and 2 are computers connected to this network, and 3 is a computer 1 or 2 via the network 5.
It is a shared I / O device such as a printer that is used together.
Further, 1a, 2a and 3a are power source input lines for the computers 1 and 2 and the shared I / O device 3, respectively.
【０００４】この図３に示すように従来はネットワーク
５に接続されている共有Ｉ／Ｏ装置３の電源入力線３ａ
は独立しており、共有Ｉ／Ｏ装置３の電源のｏｎ／ｏｆ
ｆの制御はネットワーク５に接続されているコンピュー
タ１，２の電源ｏｎ／ｏｆｆに無関係に手動で行われて
いた。As shown in FIG. 3, the power input line 3a of the shared I / O device 3 conventionally connected to the network 5 is used.
Are independent, and the power of the shared I / O device 3 is turned on / of
The control of f was performed manually regardless of the power on / off of the computers 1 and 2 connected to the network 5.
【０００５】[0005]
【発明が解決しようとする課題】ネットワーク５に接続
されている共有Ｉ／Ｏ装置３は、不特定多数の人が利用
しているため共有Ｉ／Ｏ装置の電源のｏｆｆは特に注意
しなければならない。しかしながら、ネットワークの構
成が大規模かつ複雑になると誰がネットワークを使用中
であるか容易にわからないので電源をｏｆｆすることは
容易でない。Since the shared I / O device 3 connected to the network 5 is used by an unspecified number of people, the power of the shared I / O device should be turned off without special attention. I won't. However, it is not easy to turn the power off because it is not easy to know who is using the network when the network configuration becomes large and complicated.
【０００６】またネットワーク上のコンピュータ１，２
等によって共有Ｉ／Ｏ装置を使用しようとする時は、共
有Ｉ／Ｏ装置の電源のｏｎ状態を確認しなければならず
共有Ｉ／Ｏ装置の電源がｏｆｆのとき使用しようとして
しまうミスを犯すなどの問題がある。いずれにせよ、共
有Ｉ／Ｏ装置の電源ｏｎ／ｏｆｆを行うには手動で行わ
なければならず人為的なミスをする危険性が常に存在す
る。Computers 1 and 2 on the network
When trying to use the shared I / O device due to such reasons, it is necessary to confirm the on state of the power source of the shared I / O device, and the mistake is made when the shared I / O device is powered off. There are problems such as. In any case, in order to turn on / off the power of the shared I / O device, it must be done manually, and there is always a risk of human error.
【０００７】そこで本発明では、上記の問題を解消する
ためにネットワークに接続されている共有Ｉ／Ｏ装置の
電源ｏｎ／ｏｆｆを自動的に行うことができる共有Ｉ／
Ｏ装置の電源制御装置を提供することを課題とする。Therefore, in the present invention, in order to solve the above problem, the power supply of the shared I / O device connected to the network can be automatically turned on / off.
It is an object to provide a power supply control device for an O device.
【０００８】[0008]
【課題を解決するための手段】前記の課題を解決するた
めに、本発明の電源制御装置は、複数のコンピュータ
（パソコン６，ワークステーション８など）がネットワ
ーク（５など）を介して共通の入出力装置（プリンタ３
１など、以下、共有Ｉ／Ｏ装置という）を利用するシス
テムにおいて、前記コンピュータの各々の電源（電源入
力線６ａ，８ａなど）のオン，オフ状態を（電源出力線
６ｂ，８ｂ、電圧検出回路１３，１４などを介し）監視
し、電源がオン状態のコンピュータが有れば前記共有Ｉ
／Ｏ装置に対する電源路（電源入力線１０ａと３ａの間
など）を閉じ、電源がオン状態のコンピュータが無けれ
ば前記共有Ｉ／Ｏ装置に対する電源路を開く手段（論理
回路１５，電源電圧出力回路１６など）を備えたものと
する。In order to solve the above-mentioned problems, in the power supply control device of the present invention, a plurality of computers (personal computers 6, workstations 8 etc.) are connected in common via a network (5 etc.). Output device (printer 3
In a system using a shared I / O device, such as 1 below, the on / off state of each power supply (power supply input lines 6a, 8a, etc.) of the computer (power supply output lines 6b, 8b, voltage detection circuit). 13), and if there is a computer powered on, the shared I
Means for closing the power supply path for the I / O device (between the power input lines 10a and 3a, etc.) and opening the power supply path for the shared I / O device if there is no computer in the power-on state (logic circuit 15, power supply voltage output circuit) 16 etc.).
【０００９】[0009]
【作用】ネットワークに接続されているそれぞれのコン
ピュータの電源のｏｎ／ｏｆｆ状態を検出する手段と、
その状態の組合せにより共有Ｉ／Ｏ装置の電源のｏｎ／
ｏｆｆを制御する手段を設ける。ネットワークに接続さ
れているそれぞれのコンピュータの電源のｏｎ／ｏｆｆ
状態を検出する手段は、それぞれのコンピュータからそ
の電源の出力をとり、それを電圧検出回路に入力させコ
ンピュータの電源ｏｎ／ｏｆｆ状態を解析する。Function: means for detecting the on / off state of the power supply of each computer connected to the network,
Depending on the combination of the states, the power of the shared I / O device is turned on /
A means for controlling off is provided. Power on / off of each computer connected to the network
The means for detecting the state takes the output of the power source from each computer, inputs it to the voltage detection circuit, and analyzes the power on / off state of the computer.
【００１０】次に、共有Ｉ／Ｏ装置の電源のｏｎ／ｏｆ
ｆを制御する手段は、上記のそれぞれのコンピュータの
電源のｏｎ／ｏｆｆ状態を解析した信号を入力し、その
信号のうち１つでもコンピュータの電源のｏｎ状態を解
析した信号があれば、共有Ｉ／Ｏ装置の電源をｏｎにす
る出力信号を出力し、また、すべての入力信号がコンピ
ュータの電源のｏｆｆ状態を示していれば、共有Ｉ／Ｏ
装置の電源をｏｆｆにする出力信号を出力する論理回路
を用いる。Next, the power of the shared I / O device is turned on / of.
The means for controlling f inputs a signal obtained by analyzing the on / off state of the power supply of each computer, and if at least one of the signals has a signal obtained by analyzing the on state of the power supply of the computer, the shared I Outputs an output signal for turning on the power of the I / O device, and if all the input signals indicate the off state of the power supply of the computer, the shared I / O
A logic circuit that outputs an output signal that turns off the power supply of the device is used.
【００１１】[0011]
【実施例】以下図１および図２を用いて本発明の実施例
を説明する。図１は本発明の一実施例としてのシステム
構成図である。同図においてはネットワーク５にコンピ
ュータとしてパソコン６（以下ＰＣとも略す）およびワ
ークステーション８（以下ＷＳとも略す）が接続され、
また共有Ｉ／Ｏ装置としてプリンタ等３１が接続されて
いる。また６ａ，８ａは夫々ＰＣ６，ＷＳ８への電源の
入力線、６ｂ，８ｂは夫々ＰＣ６，ＷＳ８からのその電
源の出力線である。Embodiments of the present invention will be described below with reference to FIGS. FIG. 1 is a system configuration diagram as an embodiment of the present invention. In the figure, a personal computer 6 (hereinafter abbreviated as PC) and a workstation 8 (hereinafter also abbreviated as WS) are connected to the network 5 as computers,
A printer 31 or the like is connected as a shared I / O device. Also, 6a and 8a are power supply input lines to the PC6 and WS8, respectively, and 6b and 8b are output lines of the power supply from the PC6 and WS8, respectively.
【００１２】１０は本発明の主体となる共有Ｉ／Ｏ装置
用の電源制御装置であり、１０ａはこの制御装置１０へ
の電源の入力線である。この電源制御装置１０には、Ｐ
Ｃ６およびＷＳ８の本体の電源入力線６ａおよび８ａに
夫々連動した前記の電源出力線６ｂおよび８ｂが入力さ
れている。そして図３で述べた共有Ｉ／Ｏ装置への電源
の入力線３ａはこの電源制御装置１０からの出力線とし
て、電源制御装置１０と対象の共有Ｉ／Ｏ装置（この例
ではプリンタ３１）との間に設けられている。Reference numeral 10 is a power supply controller for the shared I / O device, which is the main subject of the present invention, and 10a is an input line of the power supply to the controller 10. This power control device 10 has a P
The aforementioned power supply output lines 6b and 8b interlocked with the power supply input lines 6a and 8a of the main bodies of C6 and WS8, respectively, are input. The input line 3a of the power supply to the shared I / O device described in FIG. 3 is used as an output line from the power supply control device 10 to connect the power supply control device 10 and the target shared I / O device (the printer 31 in this example). It is provided between.
【００１３】図２は図１の電源制御装置１０の内部回路
をブロック図で示したものであり、１３はＰＣ電源出力
線６ｂを入力とし、ＰＣ６の電源電圧の有無を検出する
ＰＣ電源電圧検出回路、１４は同様にＷＳ電源出力線８
ｂを入力とし、ＷＳ８の電源電圧の有無を検出するＷＳ
電源電圧検出回路である。また１５は電源電圧検出回路
１３，１４の出力の論理演算を行う論理回路、１６は論
理回路１５の出力信号に応じて制御装置用電源入力線１
０ａと共有Ｉ／Ｏ用電源入力線３ａとの間を開閉する共
有Ｉ／Ｏ用電源電圧出力回路である。FIG. 2 is a block diagram showing an internal circuit of the power supply control device 10 of FIG. 1. Reference numeral 13 is a PC power supply voltage detection for detecting the presence or absence of the power supply voltage of the PC 6 with the PC power supply output line 6b as an input. Similarly, the circuit 14 is the WS power output line 8
WS that detects the presence or absence of the power supply voltage of WS8 by inputting b
It is a power supply voltage detection circuit. Further, reference numeral 15 is a logic circuit for performing a logical operation of the outputs of the power supply voltage detection circuits 13 and 14, and 16 is a power supply input line 1 for the control device according to the output signal of the logic circuit 15.
0a and the shared I / O power supply input line 3a are opened / closed.
【００１４】次に図１，図２を参照しつつ電源制御装置
１０の動作を説明する。最初に、プリンタ３１の電源３
ａが自動的にｏｎになるとき、つまり電源制御装置１０
からプリンタ３１に電源が供給されるときを説明する。
プリンタ３１の電源３ａがｏｆｆになっているのは、Ｐ
Ｃ６とＷＳ８の両方の電源６ａ，８ａがｏｆｆになって
いるときである。ここでＰＣ６の電源６ａがｏｎになっ
たとき、図１のＰＣ電源出力線６ｂは、ＰＣ６の本体の
電源６ａと連動して電源電圧を出力する。これにより図
２の電源電圧検出回路１３は電源のｏｎ状態を示す信号
１３ａを論理回路１５に出力する。そこで論理回路１５
は電源制御装置１０が共有Ｉ／Ｏ装置へ電源電圧を供給
すべき旨の信号１５ａを出力する。従って共有Ｉ／Ｏ用
電源電圧検出回路１６は制御装置用電源入力線１０ａと
共有Ｉ／Ｏ用電源入力線３ａとを接続し、プリンタ３１
は電源制御装置１０の共有Ｉ／Ｏ用電源電圧出力回路１
６より電源の供給を受ける。Next, the operation of the power supply controller 10 will be described with reference to FIGS. First, the power supply 3 of the printer 31
When a is automatically turned on, that is, the power supply control device 10
The power supply from the printer 31 to the printer 31 will be described.
The power source 3a of the printer 31 is turned off in P
This is when both the power supplies 6a and 8a of C6 and WS8 are off. Here, when the power supply 6a of the PC 6 is turned on, the PC power supply output line 6b of FIG. 1 outputs the power supply voltage in cooperation with the power supply 6a of the main body of the PC 6. As a result, the power supply voltage detection circuit 13 of FIG. 2 outputs the signal 13a indicating the on state of the power supply to the logic circuit 15. Therefore, the logic circuit 15
Outputs a signal 15a indicating that the power supply control device 10 should supply the power supply voltage to the shared I / O device. Accordingly, the shared I / O power supply voltage detection circuit 16 connects the control device power supply input line 10a and the shared I / O power supply input line 3a, and the printer 31
Is a power supply voltage output circuit 1 for shared I / O of the power supply control device 10.
Power is supplied from 6.
【００１５】同様にＰＣ６の電源６ａに代わりＷＳ８の
電源８ａがｏｎになったとき、図１のＷＳ電源出力線８
ｂはＷＳ８の本体の電源８ａと連動して電源電圧を出力
する。これにより図２の電源電圧検出回路１４は電源の
ｏｎ状態を示す信号１４ａを論理回路１５に出力する。
そこで論理回路１５は共有Ｉ／Ｏ装置へ電源電圧を供給
すべき旨の信号１５ａを出力する。なお論理回路１５は
入力信号１３ａ，１４ａが共にｏｎ状態を示す場合にも
電源電圧を供給すべき旨の信号１５ａを出力する。従っ
てＷＳ８のみ電源８ａがｏｎになるとき、およびＰＣ
６，ＷＳ８の両方の電源６ａ，８ａがｏｎになるときも
プリンタ３１は電源供給を受けることになる。Similarly, when the power source 8a of the WS 8 is turned on instead of the power source 6a of the PC 6, the WS power source output line 8 of FIG.
b outputs the power supply voltage in cooperation with the power supply 8a of the main body of WS8. As a result, the power supply voltage detection circuit 14 of FIG. 2 outputs the signal 14a indicating the on state of the power supply to the logic circuit 15.
Therefore, the logic circuit 15 outputs a signal 15a indicating that the power supply voltage should be supplied to the shared I / O device. The logic circuit 15 outputs the signal 15a indicating that the power supply voltage should be supplied even when both the input signals 13a and 14a indicate the on state. Therefore, when the power supply 8a is turned on only for WS8, and
Even when both the power supplies 6a and 8a of the WS6 and WS8 are turned on, the printer 31 is supplied with power.
【００１６】次に、プリンタ３１の電源３ａが自動的に
ｏｆｆになるとき、つまり電源制御装置１０より電源の
供給がｏｆｆになるときを説明する。プリンタ３１の電
源３ａがｏｎになっているのは、ＰＣ６とＷＳ８のうち
少なくとも１台の電源がｏｎになっているときである。
ここで、ＰＣ６とＷＳ８の両方の電源６ａ，８ａが共に
ｏｆｆになったとき、図１のＰＣ６およびＷＳ８の電源
出力線６ｂ，８ｂは、ＰＣ６とＷＳ８の本体の電源６
ａ，８ａと連動して共にｏｆｆとなる。そこで図２の電
源電圧検出回路１３，１４は電源のｏｆｆ状態を示す信
号１３ａ，１４ａを論理回路１５に出力する。そこで論
理回路１５は電源制御装置１０が電源電圧の出力をｏｆ
ｆすべき旨の信号１５ａを出力する。従って、共有Ｉ／
Ｏ用電源電圧出力回路１６は制御装置用電源入力線１０
ａと共有Ｉ／Ｏ用電源入力線３ａとの間の接続を断ち、
これによりプリンタ３１への電源の供給がｏｆｆされ
る。Next, the case where the power supply 3a of the printer 31 is automatically turned off, that is, the case where the power supply from the power supply control device 10 is turned off will be described. The power supply 3a of the printer 31 is on when at least one of the PC 6 and the WS 8 is on.
Here, when both the power supplies 6a and 8a of the PC 6 and the WS 8 are turned off, the power output lines 6b and 8b of the PC 6 and the WS 8 of FIG.
Both are off in cooperation with a and 8a. Therefore, the power supply voltage detection circuits 13 and 14 of FIG. 2 output signals 13a and 14a indicating the off state of the power supply to the logic circuit 15. Therefore, in the logic circuit 15, the power supply controller 10 outputs the output of the power supply voltage of
The signal 15a to the effect that f should be output is output. Therefore, shared I /
The power supply voltage output circuit 16 for O is the power supply input line 10 for the control device.
a and the shared I / O power input line 3a are disconnected,
As a result, the power supply to the printer 31 is turned off.
【００１７】以上、ネットワーク５上におけるコンピュ
ータがＰＣ６とＷＳ８の２台の場合を説明したが、ネッ
トワーク上におけるコンピュータが２台以上の場合にお
いても、またプリンタ以外の共有Ｉ／Ｏ装置が存在する
場合においてもこの発明は同様に適用される。The case where the number of computers on the network 5 is two, that is, the PC 6 and the WS 8, has been described above. However, even when there are two or more computers on the network, and when there is a shared I / O device other than the printer. The present invention is similarly applied to.
【００１８】[0018]
【発明の効果】本発明によれば、ネットワーク上の複数
のコンピュータの電源の有無を監視し、１台でも電源が
ｏｎしていればネットワーク上の共有Ｉ／Ｏ装置の電源
を自動的にｏｎし、複数のコンピュータの電源が全てｏ
ｆｆしたときは共有Ｉ／Ｏ装置の電源を自動的にｏｆｆ
するようにしたので、従来、コンピュータの個々使用状
態を調べて共有Ｉ／Ｏ装置の電源を手動でｏｎ／ｏｆｆ
したのに比べ煩わしさがなくなり、また共有Ｉ／Ｏ装置
がｏｆｆ状態のままコンピュータの使用を開始するミス
を防ぐことができる。According to the present invention, the presence / absence of power supply to a plurality of computers on a network is monitored, and the power of a shared I / O device on the network is automatically turned on if at least one computer is on. However, the power of multiple computers is all o
When turned off, the power of the shared I / O device is automatically turned off.
Therefore, conventionally, the state of individual use of the computer is checked and the power of the shared I / O device is manually turned on / off.
Compared with the above, it is less troublesome, and it is possible to prevent the mistake of starting the use of the computer while the shared I / O device is in the off state.
【図１】本発明の一実施例としてのシステム構成図FIG. 1 is a system configuration diagram as an embodiment of the present invention.
【図２】図１の電源制御装置の内部のブロック回路図FIG. 2 is a block circuit diagram inside the power supply control device of FIG.
【図３】図１に対応する従来のシステム構成図FIG. 3 is a conventional system configuration diagram corresponding to FIG.
３ａ 共有Ｉ／Ｏ用電源入力線 ５ ネットワーク ６ パソコン（ＰＣ） ６ａ パソコンの電源入力線 ６ｂ パソコンの電源出力線 ８ ワークステーション（ＷＳ） ８ａ ワークステーションの電源入力線 ８ｂ ワークステーションの電源出力線 １０ 共有Ｉ／Ｏ用電源制御装置 １０ａ 制御装置用電源入力線 １３ パソコンの電源電圧検出回路 １４ ワークステーションの電源電圧検出回路 １５ 論理回路 １６ 共有Ｉ／Ｏ用電源電圧出力回路 ３１ プリンタ 3a Power input line for shared I / O 5 Network 6 Personal computer (PC) 6a Power input line for personal computer 6b Power output line for personal computer 8 Workstation (WS) 8a Power input line for workstation 8b Power output line for workstation 10 Shared I / O power supply control device 10a Control device power supply input line 13 Personal computer power supply voltage detection circuit 14 Workstation power supply voltage detection circuit 15 Logic circuit 16 Shared I / O power supply voltage output circuit 31 Printer
Claims (1)
て共通の入出力装置（以下、共有Ｉ／Ｏ装置という）を
利用するシステムにおいて、 前記コンピュータの各々の電源のオン，オフ状態を監視
し、電源がオン状態のコンピュータが有れば前記共有Ｉ
／Ｏ装置に対する電源路を閉じ、電源がオン状態のコン
ピュータが無ければ前記共有Ｉ／Ｏ装置に対する電源路
を開く手段を備えたことを特徴とする共有Ｉ／Ｏ装置の
電源制御装置。1. A system in which a plurality of computers use a common input / output device (hereinafter referred to as a shared I / O device) via a network, the on / off state of each of the computers is monitored, If there is a computer that is turned on, the shared I
A power supply control device for a shared I / O device, comprising means for closing the power supply line for the I / O device and opening the power supply line for the shared I / O device if there is no computer in a power-on state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5023089A JPH06242858A (en) | 1993-02-12 | 1993-02-12 | Power source controller of shared i/o device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5023089A JPH06242858A (en) | 1993-02-12 | 1993-02-12 | Power source controller of shared i/o device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06242858A true JPH06242858A (en) | 1994-09-02 |
Family
ID=12100707
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5023089A Pending JPH06242858A (en) | 1993-02-12 | 1993-02-12 | Power source controller of shared i/o device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06242858A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001013938A (en) * | 1999-07-02 | 2001-01-19 | Matsushita Electric Ind Co Ltd | Display device |
| JP2012089065A (en) * | 2010-10-22 | 2012-05-10 | Toshiba Corp | Information processing apparatus, information processing method and information processing system |
-
1993
- 1993-02-12 JP JP5023089A patent/JPH06242858A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001013938A (en) * | 1999-07-02 | 2001-01-19 | Matsushita Electric Ind Co Ltd | Display device |
| JP2012089065A (en) * | 2010-10-22 | 2012-05-10 | Toshiba Corp | Information processing apparatus, information processing method and information processing system |
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