JPH01173896U - - Google Patents
Info
- Publication number
- JPH01173896U JPH01173896U JP6541688U JP6541688U JPH01173896U JP H01173896 U JPH01173896 U JP H01173896U JP 6541688 U JP6541688 U JP 6541688U JP 6541688 U JP6541688 U JP 6541688U JP H01173896 U JPH01173896 U JP H01173896U
- Authority
- JP
- Japan
- Prior art keywords
- change
- amount
- alarm
- set value
- hold
- 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
- 238000000034 method Methods 0.000 claims 2
- 238000005070 sampling Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Testing Or Calibration Of Command Recording Devices (AREA)
- Emergency Alarm Devices (AREA)
- Alarm Systems (AREA)
Description
第１図は本考案の一実施例の構成図、第２図は
そのタイミングチヤート、第３図は従来例の構成
図である。
１……変化量演算器、２……検出器、３……外
部電源、４……電源装置、５……内部電源、６…
…変化量比較時間設定手段、７……タイミング発
生回路、９……第１のホールド回路、１０……第
２のホールド回路、１４……第３のホールド回路
、１６，１７……判定回路、１８，１９……比較
回路。
FIG. 1 is a block diagram of an embodiment of the present invention, FIG. 2 is a timing chart thereof, and FIG. 3 is a block diagram of a conventional example. DESCRIPTION OF SYMBOLS 1... Change amount calculator, 2... Detector, 3... External power supply, 4... Power supply device, 5... Internal power supply, 6...
... Change amount comparison time setting means, 7 ... Timing generation circuit, 9 ... First hold circuit, 10 ... Second hold circuit, 14 ... Third hold circuit, 16, 17 ... Judgment circuit, 18, 19... Comparison circuit.
Claims (1)
の変化量が所定の設定値を逸脱したとき警報を出
力する警報設定機能付き変化量演算器において、
検出器から入力される動的なプロセス量を所定の
タイミングでサンプリングする第１のホールド回
路と、前回のサンプリング値を今回のタイミング
まで保留する第２のホールド回路と、前記２つの
ホールド回路の値より時間的な変化状態をプラス
側又はマイナス側のいずれかに判定する判定回路
と、前記２つのホールド回路の値の差値を変化量
として保留する第３のホールド回路と、該変化量
がプラス側又はマイナス側の設定値を逸脱したと
き警報を出力する２つの比較回路とを備えたこと
を特徴とする警報設定機能付き変化量演算器。 In a change amount calculator with an alarm setting function that calculates the amount of change in a process quantity over time and outputs an alarm when the amount of change deviates from a predetermined set value,
A first hold circuit that samples the dynamic process amount input from the detector at a predetermined timing, a second hold circuit that holds the previous sampling value until the current timing, and the values of the two hold circuits. a determination circuit that determines whether the change over time is positive or negative; a third hold circuit that holds the difference between the values of the two hold circuits as the amount of change; 1. A change amount calculation unit with an alarm setting function, comprising two comparison circuits that output an alarm when a set value is deviated from a set value on the negative side or the negative side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6541688U JPH01173896U (en) | 1988-05-18 | 1988-05-18 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6541688U JPH01173896U (en) | 1988-05-18 | 1988-05-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01173896U true JPH01173896U (en) | 1989-12-11 |
Family
ID=31290852
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6541688U Pending JPH01173896U (en) | 1988-05-18 | 1988-05-18 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01173896U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5723318A (en) * | 1980-07-18 | 1982-02-06 | Fanuc Ltd | Comparator using programable unijunction transistor |
-
1988
- 1988-05-18 JP JP6541688U patent/JPH01173896U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5723318A (en) * | 1980-07-18 | 1982-02-06 | Fanuc Ltd | Comparator using programable unijunction transistor |
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