JPH0433101U - - Google Patents
Info
- Publication number
- JPH0433101U JPH0433101U JP7084990U JP7084990U JPH0433101U JP H0433101 U JPH0433101 U JP H0433101U JP 7084990 U JP7084990 U JP 7084990U JP 7084990 U JP7084990 U JP 7084990U JP H0433101 U JPH0433101 U JP H0433101U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- predetermined value
- signal
- outputs
- abnormal
- 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
- 230000002159 abnormal effect Effects 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Safety Devices In Control Systems (AREA)
Description
第１図は本考案の一実施例を表すブロツク図、
第２図は第１図に示す実施例のソフト動作を表す
フローチヤート、第３図及び第４図は従来例を表
すブロツク図、第５図は第３図及び第４図に示す
従来例のソフト動作を表すフローチヤートである
。
１……入力回路、２……マイクロプロセツサ回
路、３……アナログ出力回路、４……デジタル出
力回路、５……マイクロコントローラ異常信号接
点、６……制限値設定回路、６−１，６−４，６
−７……抵抗器、６−２，６−８……スイツチ回
路、６−３……演算増幅器、６−５……電圧比較
器、６−６，７……可変抵抗器、６−９……ＯＲ
論理回路、６−１０……スイツチ駆動回路。
FIG. 1 is a block diagram showing an embodiment of the present invention.
FIG. 2 is a flowchart showing the software operation of the embodiment shown in FIG. 1, FIGS. 3 and 4 are block diagrams showing the conventional example, and FIG. 5 is a flowchart showing the conventional example shown in FIGS. 3 and 4. This is a flowchart showing software operations. 1... Input circuit, 2... Microprocessor circuit, 3... Analog output circuit, 4... Digital output circuit, 5... Microcontroller abnormal signal contact, 6... Limit value setting circuit, 6-1, 6 -4,6
-7... Resistor, 6-2, 6-8... Switch circuit, 6-3... Operational amplifier, 6-5... Voltage comparator, 6-6, 7... Variable resistor, 6-9 ...OR
Logic circuit, 6-10...Switch drive circuit.
Claims (1)
演算結果が所定値を越える場合、前記入力信号が
異常の場合、マイクロコントローラが異常の場合
は前記所定値を出力するマイクロコントローラの
制限値設定回路において、前記演算結果を出力す
る第１回路と、前記所定値を設定する所定値設定
回路と、この所定値設定回路で設定された前記所
定値を出力する第２回路と、前記第１回路の出力
が前記所定値設定回路の出力と同じか越える場合
信号を出力する比較回路と、この比較回路の出力
信号、前記入力信号の異常信号、前記マイクロコ
ントローラの異常信号のいずれかの信号が入力し
た場合には前記第２回路を選択し、前記いずれか
の信号がない場合は前記第１回路を選択して出力
回路とする切換回路とを備えたことを特徴とする
マイクロコントローラの制限値設定回路。 A limit value setting circuit for a microcontroller that calculates an input signal and outputs a calculation result, but outputs the predetermined value if the calculation result exceeds a predetermined value, if the input signal is abnormal, or if the microcontroller is abnormal. A first circuit that outputs the calculation result, a predetermined value setting circuit that sets the predetermined value, a second circuit that outputs the predetermined value set by the predetermined value setting circuit, and a first circuit that outputs the predetermined value. a comparator circuit that outputs a signal when the output is equal to or exceeds the output of the predetermined value setting circuit, and any one of the output signal of the comparator circuit, the abnormal signal of the input signal, and the abnormal signal of the microcontroller is input a switching circuit that selects the second circuit when there is no signal, and selects the first circuit as an output circuit when there is no signal. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7084990U JPH0433101U (en) | 1990-07-03 | 1990-07-03 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7084990U JPH0433101U (en) | 1990-07-03 | 1990-07-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0433101U true JPH0433101U (en) | 1992-03-18 |
Family
ID=31607361
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7084990U Pending JPH0433101U (en) | 1990-07-03 | 1990-07-03 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0433101U (en) |
-
1990
- 1990-07-03 JP JP7084990U patent/JPH0433101U/ja active Pending
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