JPS5557926A - Output controller of programmable controller - Google Patents
Output controller of programmable controllerInfo
- Publication number
- JPS5557926A JPS5557926A JP13202178A JP13202178A JPS5557926A JP S5557926 A JPS5557926 A JP S5557926A JP 13202178 A JP13202178 A JP 13202178A JP 13202178 A JP13202178 A JP 13202178A JP S5557926 A JPS5557926 A JP S5557926A
- Authority
- JP
- Japan
- Prior art keywords
- output
- circuit
- signal
- control
- cpu1
- 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 improve control reliability by reading the control output state of a controlled unit again, by making a check on whether its contents are in an expected output state or not, and by sending an output ready signal when normal.
CONSTITUTION: The contents of memory 2 stored with a program needed for control are decoded by CPU1 and then executed. Input signal 4 is processed by CPU1 after passing through digital input circuit 5 and input control circuit 6 and then supplied to output control circuit 7 and digital output circuit 8 in sequence to output signal 9. Signal 9 is fed back to re-read circuit 10 and then read into CPU1. Then, the read contents are collated with output contents in CPU1 and when the both agree each other, circuit 8 sends out output ready signal 11 and signal 11 and output signal 9 AND-ed by AND circuit 12 to generate control output 13. Since an output is sent out on reconfirming the output from circuit 8, error control is eliminated and reliability improves.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13202178A JPS5557926A (en) | 1978-10-25 | 1978-10-25 | Output controller of programmable controller |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13202178A JPS5557926A (en) | 1978-10-25 | 1978-10-25 | Output controller of programmable controller |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5557926A true JPS5557926A (en) | 1980-04-30 |
Family
ID=15071657
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13202178A Pending JPS5557926A (en) | 1978-10-25 | 1978-10-25 | Output controller of programmable controller |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5557926A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59132050A (en) * | 1983-01-17 | 1984-07-30 | Meidensha Electric Mfg Co Ltd | Erroneous output preventing circuit of microcomputer system or the like |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5020185A (en) * | 1973-06-22 | 1975-03-03 |
-
1978
- 1978-10-25 JP JP13202178A patent/JPS5557926A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5020185A (en) * | 1973-06-22 | 1975-03-03 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59132050A (en) * | 1983-01-17 | 1984-07-30 | Meidensha Electric Mfg Co Ltd | Erroneous output preventing circuit of microcomputer system or the like |
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