JPH01160743U - - Google Patents
Info
- Publication number
- JPH01160743U JPH01160743U JP5632388U JP5632388U JPH01160743U JP H01160743 U JPH01160743 U JP H01160743U JP 5632388 U JP5632388 U JP 5632388U JP 5632388 U JP5632388 U JP 5632388U JP H01160743 U JPH01160743 U JP H01160743U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- microprocessor
- analog
- outputting
- output current
- 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.)
- Granted
Links
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 238000012544 monitoring process Methods 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Arrangements For Transmission Of Measured Signals (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Description
第１図は本考案の１実施例の全体構成を示すブ
ロツク図、第２図は第１図に示す電源監視回路と
これに関連する部分の詳細な構成を示す回路図、
第３図は従来の２線式信号伝送器の全体構成を示
すブロツク図、第４図は第３図に示すアナログ信
号変換器とこれに関連する回路の詳細な構成を示
す回路図である。
１０……センサ、１１……アナログ／デジタル
変換器、１２……マイクロプロセツサ、１３……
メモリ、１４……表示器、１５……パルス幅／電
流変換回路、１６……出力回路、１７……アナロ
グ信号変換器、１８……定電圧回路、１９……バ
ーンアウト回路、２０……レベル変換回路、２１
……積分回路、２２……ドライバ回路、２３……
電源監視回路、ＰＷＭ……パルス幅信号、ＶＳＴ
……停止信号、ＶｂＴ……振切信号、ＶＣＴ……
制御信号。
FIG. 1 is a block diagram showing the overall configuration of one embodiment of the present invention, FIG. 2 is a circuit diagram showing the detailed configuration of the power supply monitoring circuit shown in FIG. 1 and related parts,
FIG. 3 is a block diagram showing the overall configuration of a conventional two-wire signal transmitter, and FIG. 4 is a circuit diagram showing the detailed configuration of the analog signal converter shown in FIG. 3 and related circuits. 10...sensor, 11...analog/digital converter, 12...microprocessor, 13...
Memory, 14... Display, 15... Pulse width/current conversion circuit, 16... Output circuit, 17... Analog signal converter, 18... Constant voltage circuit, 19... Burnout circuit, 20... Level Conversion circuit, 21
...Integrator circuit, 22...Driver circuit, 23...
Power supply monitoring circuit, PWM...Pulse width signal, VST
...stop signal, VbT ...cutoff signal, VCT...
Control signal.
Claims (1)
受けると共にアナログ／デジタル変換手段で物理
量をデジタル信号に変換しこのデジタル信号をも
ちいてマイクロプロセツサで所定の演算を実行し
てその結果をアナログ信号変換手段によりアナロ
グ信号に変換して前記伝送線を介して負荷に出力
電流を伝送する２線式信号伝送器において、前記
マイクロプロセツサからの停止信号に基づいて前
記出力電流を０％側或いは１００％側に振切らせ
る振切信号を前記アナログ変換手段に出力するバ
ーンアウト手段と、前記アナログ変換手段の出力
電圧が入力されこの出力電圧が第１所定値より上
昇したときに前記マイクロプロセツサに動作開始
を指示する制御信号を出力し第２所定値より低下
したときに前記マイクロプロセツサに動作停止を
指示する制御信号を出力すると共に前記第１所定
値と第２所定値との差が前記バーンアウト手段の
動作による出力電圧の電圧変動値より大きくなる
ように定数が選定された電源監視手段とを具備す
ることを特徴とする２線式信号伝送器。 A current is supplied from the load side via a two-wire transmission line, and an analog/digital conversion means converts the physical quantity into a digital signal. Using this digital signal, a microprocessor executes a predetermined calculation and outputs the result. In a two-wire signal transmitter that converts the output current into an analog signal using an analog signal conversion means and transmits the output current to the load via the transmission line, the output current is set to the 0% side based on a stop signal from the microprocessor. Alternatively, burnout means outputs a cut-off signal to the analog conversion means to make the cut-off signal to the 100% side; outputting a control signal instructing the processor to start operation; and when the value falls below a second predetermined value, outputting a control signal instructing the microprocessor to stop operating; and also outputting a control signal instructing the microprocessor to stop operating; and power supply monitoring means having a constant selected such that the output voltage is larger than the voltage fluctuation value of the output voltage due to the operation of the burnout means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5632388U JPH0625073Y2 (en) | 1988-04-26 | 1988-04-26 | 2-wire signal transmitter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5632388U JPH0625073Y2 (en) | 1988-04-26 | 1988-04-26 | 2-wire signal transmitter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01160743U true JPH01160743U (en) | 1989-11-08 |
| JPH0625073Y2 JPH0625073Y2 (en) | 1994-06-29 |
Family
ID=31282202
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5632388U Expired - Lifetime JPH0625073Y2 (en) | 1988-04-26 | 1988-04-26 | 2-wire signal transmitter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0625073Y2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5127551B2 (en) | 2008-04-28 | 2013-01-23 | アズビル株式会社 | Field equipment |
| JP4999789B2 (en) * | 2008-06-27 | 2012-08-15 | アズビル株式会社 | Field equipment |
-
1988
- 1988-04-26 JP JP5632388U patent/JPH0625073Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0625073Y2 (en) | 1994-06-29 |