JPS5557926A - Output controller of programmable controller - Google Patents

Output controller of programmable controller

Info

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
Application number
JP13202178A
Other languages
Japanese (ja)
Inventor
Akira Kaneda
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP13202178A priority Critical patent/JPS5557926A/en
Publication of JPS5557926A publication Critical patent/JPS5557926A/en
Pending legal-status Critical Current

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
JP13202178A 1978-10-25 1978-10-25 Output controller of programmable controller Pending JPS5557926A (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5020185A (en) * 1973-06-22 1975-03-03

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5020185A (en) * 1973-06-22 1975-03-03

Cited By (1)

* Cited by examiner, † Cited by third party
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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