JPH0394000U - - Google Patents
Info
- Publication number
- JPH0394000U JPH0394000U JP160490U JP160490U JPH0394000U JP H0394000 U JPH0394000 U JP H0394000U JP 160490 U JP160490 U JP 160490U JP 160490 U JP160490 U JP 160490U JP H0394000 U JPH0394000 U JP H0394000U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- contacts
- main
- holding means
- blocking
- 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
- 238000012806 monitoring device Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 2
- 230000000903 blocking effect Effects 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Alarm Systems (AREA)
Description
第１図は本考案の一実施例に係わる入力信号監
視装置の構成を示す回路図、第２図は上記入力信
号監視装置における接点入力信号処理カードの構
成のみ抜出して示す回路図、第３図Ａ〜Ｄはそれ
ぞれ正常動作時、ケーブル短絡時、ケーブル断線
時、補機動作中のケーブル短絡時における上記入
力信号処理回路各部の動作状態を示すタイミング
チヤート、第４図は例えばプラント補機をシーケ
ンス制御するための従来の状態量入力装置を示す
回路図である。
１１……プロセスセンサ、１２……接点入力信
号処理カード、１３ａ，１３ｂ……フオトカプラ
、１４……二次出力信号、１５……接点入力信号
ケーブル、１６……排他的論理和回路、１７……
否定回路、１８ａ，１８ｂ……論理積回路、１９
……記憶回路、２０ａ，２０ｂ……限時動作回路
、２１……警報出力信号。
FIG. 1 is a circuit diagram showing the configuration of an input signal monitoring device according to an embodiment of the present invention, FIG. 2 is a circuit diagram showing only the configuration of a contact input signal processing card in the input signal monitoring device, and FIG. 3 A to D are timing charts showing the operating states of each part of the input signal processing circuit during normal operation, when a cable is short-circuited, when a cable is disconnected, and when a cable is short-circuited during auxiliary equipment operation. FIG. 2 is a circuit diagram showing a conventional state quantity input device for control. 11...Process sensor, 12...Contact input signal processing card, 13a, 13b...Photocoupler, 14...Secondary output signal, 15...Contact input signal cable, 16...Exclusive OR circuit, 17...
NOT circuit, 18a, 18b...AND circuit, 19
...Memory circuit, 20a, 20b...Time-limited operation circuit, 21...Alarm output signal.
Claims (1)
切換え動作するスイツチ手段と、 このスイツチ手段における２接点をそれぞれ主
及び副接点とし該主接点から得られる状態信号を
制御情報として記憶保持する信号保持手段と、 この信号保持手段と上記スイツチ手段との間に
設けられ該スイツチ手段における主及び副接点か
ら得られる信号内容が何れも同一の信号内容とな
つた場合に該主接点から信号保持手段に対する状
態信号の供給を阻止する信号供給阻止手段とを具
備したことを特徴とする入力信号監視装置。[Scope of Claim for Utility Model Registration] A switch means that switches between two contacts in response to changes in various process state quantities, and a state signal obtained from the main contacts, with the two contacts in the switch means being main and sub contacts, respectively. A signal holding means is provided between the signal holding means and the switching means to memorize and hold it as control information, and when the signal contents obtained from the main and auxiliary contacts of the switching means both become the same signal content. An input signal monitoring device comprising signal supply blocking means for blocking the supply of a status signal from the main contact to the signal holding means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP160490U JPH0394000U (en) | 1990-01-16 | 1990-01-16 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP160490U JPH0394000U (en) | 1990-01-16 | 1990-01-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0394000U true JPH0394000U (en) | 1991-09-25 |
Family
ID=31505501
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP160490U Pending JPH0394000U (en) | 1990-01-16 | 1990-01-16 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0394000U (en) |
-
1990
- 1990-01-16 JP JP160490U patent/JPH0394000U/ja active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH0394000U (en) | ||
| JPS604676U (en) | Sanitary cleaning equipment control circuit | |
| JPS6175684U (en) | ||
| JPS5858613U (en) | Device that provides absolute position information | |
| JPH03124441U (en) | ||
| JPS613623U (en) | Actuator operated disconnector malfunction alarm device | |
| JPH02111802U (en) | ||
| JPH0275835U (en) | ||
| JPS6060633U (en) | air conditioner | |
| JPH01124934U (en) | ||
| JPH0453257U (en) | ||
| JPS62170115A (en) | Electric equipment | |
| JPS58118849U (en) | remote control device | |
| JPS58122101U (en) | blend controller | |
| JPS60174996U (en) | display device | |
| JPS5876902U (en) | Malfunction prevention circuit in microcomputer-controlled equipment | |
| JPS63122802U (en) | ||
| JPS5854786U (en) | Vending machine product selection device | |
| JPS58103548U (en) | Alternating operation device | |
| JPS6178348U (en) | ||
| JPS63173927U (en) | ||
| JPS60104906U (en) | Plant failure confirmation operation circuit | |
| JPS59147327U (en) | Switching input judgment circuit | |
| JPS6418348U (en) | ||
| JPH0184147U (en) |