JPS55102062A - Fail safe system - Google Patents
Fail safe systemInfo
- Publication number
- JPS55102062A JPS55102062A JP902179A JP902179A JPS55102062A JP S55102062 A JPS55102062 A JP S55102062A JP 902179 A JP902179 A JP 902179A JP 902179 A JP902179 A JP 902179A JP S55102062 A JPS55102062 A JP S55102062A
- Authority
- JP
- Japan
- Prior art keywords
- outputted
- pulse
- shift register
- control signal
- output
- 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
PURPOSE: To enable to avoid runaway by inhibiting the operation of controlled unit with control signal, through the inhibition of the output of enable signal when the output OFF is detected from the watchdog timer.
CONSTITUTION: When the computer system 1 receives the control signal output instruction, the control signal A is outputted. In this case, the enable signal B and the pulse D from the watchdog timer are simultaneously outputted. The enable signal B is inputted to the two-stage shift register 2 and the pulse D is inputted to the two-stage shift register 2 and the detector 3. When the pulse D is normally outputted from the two-stage shift register 2, the enable signals C1WC2 are sequentially outputted. If program runaway is taken place due to some causes, the pulse D is not outputted. When the detector 3 detects it, the signal E is outputted to inhibit the output from the shift register 2. Accordingly, no controlled unit is operative even with the control signal instruction received.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP902179A JPS55102062A (en) | 1979-01-29 | 1979-01-29 | Fail safe system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP902179A JPS55102062A (en) | 1979-01-29 | 1979-01-29 | Fail safe system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55102062A true JPS55102062A (en) | 1980-08-04 |
Family
ID=11708993
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP902179A Pending JPS55102062A (en) | 1979-01-29 | 1979-01-29 | Fail safe system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55102062A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57176237A (en) * | 1981-04-18 | 1982-10-29 | Toyoda Automatic Loom Works | Monitoring of micro-computer in loom |
US4608492A (en) * | 1983-05-19 | 1986-08-26 | Teledyne Industries, Inc. | Ultraviolet monitor suntan alarm with self test routines |
JPS63258228A (en) * | 1987-04-16 | 1988-10-25 | Honda Motor Co Ltd | Control circuit of constant speed travel device for vehicle |
JPS63258229A (en) * | 1987-04-16 | 1988-10-25 | Honda Motor Co Ltd | Control circuit of constant speed travel device for vehicle |
-
1979
- 1979-01-29 JP JP902179A patent/JPS55102062A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57176237A (en) * | 1981-04-18 | 1982-10-29 | Toyoda Automatic Loom Works | Monitoring of micro-computer in loom |
US4608492A (en) * | 1983-05-19 | 1986-08-26 | Teledyne Industries, Inc. | Ultraviolet monitor suntan alarm with self test routines |
JPS63258228A (en) * | 1987-04-16 | 1988-10-25 | Honda Motor Co Ltd | Control circuit of constant speed travel device for vehicle |
JPS63258229A (en) * | 1987-04-16 | 1988-10-25 | Honda Motor Co Ltd | Control circuit of constant speed travel device for vehicle |
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