JPS58167908U - Failure detection circuit - Google Patents
Failure detection circuitInfo
- Publication number
- JPS58167908U JPS58167908U JP6583682U JP6583682U JPS58167908U JP S58167908 U JPS58167908 U JP S58167908U JP 6583682 U JP6583682 U JP 6583682U JP 6583682 U JP6583682 U JP 6583682U JP S58167908 U JPS58167908 U JP S58167908U
- Authority
- JP
- Japan
- Prior art keywords
- converter
- detection circuit
- failure detection
- process control
- input
- 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
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は従来のプロセス制御装置の一例を示すブロック
構成図、第２図はこの考案の一実施例を示すブロック構
成図、第３図Ａ及びＢはこの考案の動作例を示すフロー
チャートである。 −１・・・マイクロコンピュー
タ（ＭＰＵ）、２・・・ＲＯＭ。
３・・・ＲＡＭ、４，５．６・・・出力ポート（ｏｐ）
、７・・・入力ポート（ＩＰ）、５に、 ６Ｋ・・・
アナログスイッチ、８・・・ＤＡ変換器（ＤＡＣ）、９
・・・比較器、ＩＯＡ〜１０Ｃ・・・コンデンサ、１１
Ａ〜１１Ｃ・・・演算増幅 器。Fig. 1 is a block diagram showing an example of a conventional process control device, Fig. 2 is a block diagram showing an embodiment of this invention, and Figs. 3 A and B are flowcharts showing an example of the operation of this invention. . -1... Microcomputer (MPU), 2... ROM. 3...RAM, 4,5.6...Output port (op)
, 7... Input port (IP), 5, 6K...
Analog switch, 8...DA converter (DAC), 9
...Comparator, IOA~10C...Capacitor, 11
A~11C...Operation amplifier.
Claims (1)
ュータにより演算処理し、ＤＡ変換器を介してプロセス
計器等に入出力するようにしたプロセス制御装置におい
て、アナログ基準信号を前記ＤＡ変換器を介して２種類
のビット情報によりＡＤ変換せしめ、当該ＤＡ変換器の
ビットエラーを検出するようにしたことを特徴とする故
障検知回路。In a process control device in which analog input/output signals of a process control system are processed by a microcomputer and input/outputted to a process instrument, etc. via a DA converter, two types of analog reference signals are generated via the DA converter. 1. A failure detection circuit, characterized in that it performs AD conversion based on bit information of the DA converter and detects a bit error in the DA converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6583682U JPS58167908U (en) | 1982-05-06 | 1982-05-06 | Failure detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6583682U JPS58167908U (en) | 1982-05-06 | 1982-05-06 | Failure detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58167908U true JPS58167908U (en) | 1983-11-09 |
Family
ID=30075767
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6583682U Pending JPS58167908U (en) | 1982-05-06 | 1982-05-06 | Failure detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58167908U (en) |
-
1982
- 1982-05-06 JP JP6583682U patent/JPS58167908U/en active Pending
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