JPH0441535B2 - - Google Patents
Info
- Publication number
- JPH0441535B2 JPH0441535B2 JP57178027A JP17802782A JPH0441535B2 JP H0441535 B2 JPH0441535 B2 JP H0441535B2 JP 57178027 A JP57178027 A JP 57178027A JP 17802782 A JP17802782 A JP 17802782A JP H0441535 B2 JPH0441535 B2 JP H0441535B2
- Authority
- JP
- Japan
- Prior art keywords
- input
- common line
- isolated
- signal
- failures
- 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 - Lifetime
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/78—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used using opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically-coupled
- H03K17/795—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used using opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically-coupled controlling bipolar transistors
- H03K17/7955—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used using opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically-coupled controlling bipolar transistors using phototransistors
Landscapes
- Electronic Switches (AREA)
Description
【発明の詳細な説明】
本発明は、マイクロ・コンピユータないし制御
用コンピユータで使用するデジタル入力回路に関
するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a digital input circuit for use in a microcomputer or control computer.
従来、この種のデジタル入力回路として第１図
に示すものがあつた。この第１図において１，１
Ａ…１ｎはオン・オフ入力情報を取り込むための
無電圧接点、２，２Ａ…２ｎは抵抗、３，３Ａ…
３ｎはアイソレート伝達器でここでは入力素子に
ダイオード３１，３１Ａ…３１ｎをまた出力素子
にフオト・トランジスタ３２，３２Ａ…３２ｎを
有するフオトカツプラが使われている。４は共通
線Ａを介して各フオトカツプラ３，３Ａ…３ｎを
付勢するための直流電源、さらにＤ０〜Ｄ７は、
プロセツサが取り込む信号名ないし出力端子名で
ある。 Conventionally, there has been a digital input circuit of this type as shown in FIG. In this figure 1, 1,1
A...1n is a non-voltage contact for capturing on/off input information, 2,2A...2n is a resistor, 3,3A...
3n is an isolated transmitter in which a photocoupler having diodes 31, 31A...31n as input elements and phototransistors 32, 32A...32n as output elements is used. 4 is a DC power supply for energizing each photo coupler 3, 3A...3n via a common line A, and D0 to D7 are
This is the signal name or output terminal name that the processor takes in.
次に動作について説明する。各入力接点１，１
Ａ…１ｎがオン状態の時にフオトカツプラ３，３
Ａ…３ｎの入力素子３１，３１Ａ…３１ｎに電流
が流れ、出力素子３２，３２Ａ…３２ｎのコレク
タすなわち出力端子Ｄ，Ｄ１，Ｄ７はローの信号
が送出され、また各入力接点１，１Ａ…１Ｂがオ
フ状態時にフオトカツプラ３，３Ａ…３ｎもオフ
状態で出力端子Ｄ，Ｄ１，Ｄ７はハイの信号にな
る。しかし乍ら、この回路構成ではフオトカツプ
ラが入力素子または出力素子のいずれかに導通故
障ないし開放故障がある場合には、その事実を全
く検出することができない欠点がある。 Next, the operation will be explained. Each input contact 1, 1
A...When 1n is on, photo coupler 3, 3
Current flows through the input elements 31, 31A...31n of A...3n, and a low signal is sent to the collectors of the output elements 32, 32A...32n, that is, the output terminals D, D1, D7, and each input contact 1, 1A...1B When the photo couplers 3, 3A, . . . , 3n are also off, the output terminals D, D1, and D7 become high signals. However, this circuit configuration has the disadvantage that the photocoupler cannot detect any conduction or open failure in either the input element or the output element.
この発明は、上記欠点を除去し、極めて簡単な
回路構成によつて各アイソレート伝達器の不良を
判定できるようなデジタル入力回路を提供するこ
とを目的とする。 SUMMARY OF THE INVENTION An object of the present invention is to provide a digital input circuit that eliminates the above-mentioned drawbacks and can determine whether each isolated transmitter is defective with an extremely simple circuit configuration.
以下、この発明の一実施例を図について説明す
る。第２図はその一実施例を示すデジタル入力回
路の接続図である。この第２図において、１，１
Ａ…１ｎは無電圧接点、２，２Ａ…２ｎは抵抗、
３，３Ａ…３ｎはフオトカツプラ、４，４Ａ…４
ｎは直流電源、５，５Ａ…５ｎはダイオード、６
はフオトフオトカツプラ３，３Ａ…３ｎのオープ
ン故障及びクローズ故障を診断すべく第１の共通
線Ａ及び第２の共通線Ｂにそれぞれ挿入したスイ
ツチング素子であり、ここでは二つのリレー６１
及び６２で開示している。Ｄ０〜Ｄ７は出力信号
名または出力端子を意味し、ＸおよびＹは診断制
御信号名または診断制御端子を示す。 An embodiment of the present invention will be described below with reference to the drawings. FIG. 2 is a connection diagram of a digital input circuit showing one embodiment thereof. In this figure 2, 1, 1
A...1n is a non-voltage contact, 2,2A...2n is a resistance,
3, 3A...3n is Photokatsupura, 4,4A...4
n is a DC power supply, 5,5A...5n is a diode, 6
are switching elements inserted into the first common line A and the second common line B, respectively, in order to diagnose open failures and closed failures of the photo couplers 3, 3A...3n, and here, two relays 61
and 62. D0 to D7 mean output signal names or output terminals, and X and Y indicate diagnostic control signal names or diagnostic control terminals.
次に本発明の動作について説明する。通常のモ
ードでは、制御端子Ｘがハイ信号でリレー６１が
オフ状態で、また制御端子Ｙがローで信号リレー
６２がオン状態であるとする。このときの動作は
入力接点１，１Ａ…１ｎのオン・オフ入力情報が
フオトカツプラ３，３Ａ…３ｎの入力および出力
素子３１，３１Ａ…３１ｎおよび３２，３２Ａ…
３２ｎを経由して出力端子Ｄ０〜Ｄ７に伝達され
る。ダイオード５，５Ａ…５ｎは電流の回り回路
防止用である。この状態で通常は正常な入力情報
の伝達が行われる。 Next, the operation of the present invention will be explained. In the normal mode, it is assumed that the control terminal X is a high signal and the relay 61 is off, and the control terminal Y is low and the signal relay 62 is on. The operation at this time is that the on/off input information of the input contacts 1, 1A...1n is the input and output element 31, 31A...31n of the photo coupler 3, 3A...3n and the output elements 32, 32A...
32n to the output terminals D0 to D7. The diodes 5, 5A, . . . , 5n are for preventing a current loop circuit. In this state, normally input information is transmitted normally.
次にアイソレート伝達器として使われるフオト
カツプラの診断制御法について述べる。まず、制
御端子ＸおよびＹの双方をロー信号にしリレー６
１および６２をいずれもオン状態とすると、各接
点６３および６４が閉路し、すべてのフオトカツ
プラ３，３Ａ…３ｎの一次側すなわち入力素子３
１，３１Ａ…３１ｎに共通線ＡおよびＢを介して
電流が流れ、その結果出力端子Ｄ０〜Ｄ７は全て
ロー信号のレベルの信号になるはずである。そこ
で、もしロー信号にならない信号の端子があると
その該当フオトカツプラ３，３Ａ…３ｎが故障し
ていることになる。また次に制御端子Ｙをハイ信
号にしてリレー６２をオフ状態にすると、第１の
共通線Ａを経由する回路が遮断されすべてのフオ
トカツプラ３，３Ａ…３ｎの一次側すなわち入力
素子に電流が入れることがないので、出力端子Ｄ
０〜Ｄ７は全てハイ信号のレベルの信号になるは
ずである。そこで、もしハイ信号にならない信号
の端子があるとその該当フオトカツプラ３，３Ａ
…３ｎが故障していることになる。このように制
御用スイツチング素子としてリレー６１および６
２がオン状態では特にフオトカツプラ３，３Ａ…
３ｎのオープン故障が確認でき、またリレー６２
のみオフ状態によつてフオトカツプラ３，３Ａ…
３ｎのシヨート故障が確認できるので、診断機能
が達成されることとなる。 Next, we will discuss the diagnostic control method for the photocoupler used as an isolated transmitter. First, both control terminals X and Y are set to low signal, and relay 6
1 and 62 are both turned on, the respective contacts 63 and 64 are closed, and the primary side of all the photo couplers 3, 3A...3n, that is, the input element 3
1, 31A, . . . , 31n via the common lines A and B, and as a result, the output terminals D0 to D7 should all have low signal level signals. Therefore, if there is a terminal with a signal that does not become a low signal, it means that the corresponding photo coupler 3, 3A, . . . , 3n is out of order. Next, when the control terminal Y is set to a high signal and the relay 62 is turned off, the circuit passing through the first common line A is cut off, and current flows into the primary side, that is, the input element, of all the photo couplers 3, 3A...3n. Since there is no problem, output terminal D
0 to D7 should all be high signal level signals. Therefore, if there is a terminal with a signal that does not become a high signal, the corresponding photo coupler 3, 3A
...3n is out of order. In this way, relays 61 and 6 are used as control switching elements.
Especially when 2 is on, photo cutlet 3, 3A...
3n open failure was confirmed, and relay 62
Depending on the off state, the photo cutter 3, 3A...
Since the shot failure of 3n can be confirmed, the diagnostic function is achieved.
なお、上記実施例では、この診断制御用にリレ
ーを用いたがトランジスタなどのスイツチング素
子を用いてもよく、また診断の対象がフオトカツ
プラであつたがリレーの如きアイソレート信号伝
達器であればどんな型式でも良い。 In the above embodiment, a relay is used for this diagnostic control, but a switching element such as a transistor may also be used.Also, although the object of diagnosis is a photocoupler, any isolated signal transmitter such as a relay may be used. It can also be a model.
以上のように、この発明によれば各アイソレー
ト伝達器のオープン故障及びクローズ故障を診断
すべく第１及び第２の共通線にスイツチング素子
をそれぞれ挿入するように構成したので、複数の
アイソレート伝達器の故障診断を行えるととも
に、その故障がオープン故障であるのかクローズ
故障であるのかをも判別できるなどの効果があ
る。 As described above, according to the present invention, switching elements are inserted into the first and second common lines respectively in order to diagnose open failures and closed failures of each isolated transmitter. It has the advantage of not only being able to diagnose a transmitter's failure, but also being able to determine whether the failure is an open failure or a closed failure.
第１図は従来のデジタル入力回路の接続図、第
２図は本発明の一実施例デジタル入力回路の接続
図をそれぞれ示している。
１……無電圧接点、２……抵抗、３，３Ａ…３
ｎ……アイソレート伝達器またはフオトカツプ
ラ、４……直流電源、５，５Ａ…５ｎ……ダイオ
ード、６……リレー。なお、図中同一符号は同一
または相当部分を示す。
FIG. 1 shows a connection diagram of a conventional digital input circuit, and FIG. 2 shows a connection diagram of a digital input circuit according to an embodiment of the present invention. 1...No-voltage contact, 2...Resistance, 3, 3A...3
n...Isolated transmitter or photo coupler, 4...DC power supply, 5,5A...5n...diode, 6...Relay. Note that the same reference numerals in the figures indicate the same or corresponding parts.
Claims (1)
の入力素子からなる複数の直列回路を第１の共通
線を介して並列に電源に接続し、前記各アイソレ
ート伝達器の出力素子からデジタル信号を伝送す
るデジタル入力回路において、前記複数の直列回
路ごとにダイオードの一端を前記入力接点と抵抗
間に接続するとともに、それぞれのダイオードの
他端を第２の共通線を介して前記第１の共通線に
接続し、前記各アイソレート伝達器のオープン故
障及びクローズ故障を診断すべく前記第１及び第
２の共通線にスイツチング素子をそれぞれ挿入し
たことを特徴とするデジタル入力回路。1. A plurality of series circuits consisting of input contacts, resistors, and input elements of isolated transmitters are connected in parallel to a power supply via a first common line, and a digital signal is transmitted from the output element of each isolated transmitter. In the digital input circuit, one end of a diode is connected between the input contact and the resistor for each of the plurality of series circuits, and the other end of each diode is connected to the first common line via a second common line. A digital input circuit, characterized in that switching elements are inserted into the first and second common lines to connect and diagnose open failures and close failures of each of the isolated transmitters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17802782A JPS5967727A (en) | 1982-10-09 | 1982-10-09 | Digital input circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17802782A JPS5967727A (en) | 1982-10-09 | 1982-10-09 | Digital input circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5967727A JPS5967727A (en) | 1984-04-17 |
| JPH0441535B2 true JPH0441535B2 (en) | 1992-07-08 |
Family
ID=16041299
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17802782A Granted JPS5967727A (en) | 1982-10-09 | 1982-10-09 | Digital input circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5967727A (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5046353A (en) * | 1973-08-29 | 1975-04-25 | ||
| JPS5532313A (en) * | 1978-08-29 | 1980-03-07 | Tokyo Shibaura Electric Co | Relay state indicator |
| JPS5578431A (en) * | 1978-12-06 | 1980-06-13 | Matsushita Electric Works Ltd | Contactless output electric equipment |
-
1982
- 1982-10-09 JP JP17802782A patent/JPS5967727A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5967727A (en) | 1984-04-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH0441535B2 (en) | ||
| JPS5824836B2 (en) | Kasainadonotsuhousouchi | |
| JPH06138989A (en) | Digital input circuit and checking method for the same | |
| JP2970164B2 (en) | Switching circuit | |
| JPS6220586B2 (en) | ||
| JPH0811084A (en) | Emergency stop device | |
| JPH0644706B2 (en) | AND output circuit | |
| JPS6043548B2 (en) | Digital output circuit operation confirmation method | |
| JPH0342538Y2 (en) | ||
| JPS6324452Y2 (en) | ||
| JP2569892B2 (en) | Switching control monitoring circuit | |
| JPH0138694Y2 (en) | ||
| JPS63121436A (en) | Backup source feeding system | |
| JPH0241742Y2 (en) | ||
| JPS623932Y2 (en) | ||
| JP2564152Y2 (en) | Multi-distributor | |
| JPH0434460Y2 (en) | ||
| JPS58218724A (en) | Double system relay drive device | |
| JPH0348641Y2 (en) | ||
| JPS60183826A (en) | Data transmission circuit | |
| JPS60178173A (en) | Signal device for elevator | |
| JPH01183720A (en) | Control signal checking circuit | |
| JPS608668B2 (en) | data transmission circuit | |
| JPS5866115A (en) | Fault detection for process input and output interface | |
| JPH0521366B2 (en) |