JPS556691A - Monitor unit of sequential controller - Google Patents

Monitor unit of sequential controller

Info

Publication number
JPS556691A
JPS556691A JP7986778A JP7986778A JPS556691A JP S556691 A JPS556691 A JP S556691A JP 7986778 A JP7986778 A JP 7986778A JP 7986778 A JP7986778 A JP 7986778A JP S556691 A JPS556691 A JP S556691A
Authority
JP
Japan
Prior art keywords
instruction
instruction information
circuit
address
initial
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
Application number
JP7986778A
Other languages
Japanese (ja)
Other versions
JPS5849898B2 (en
Inventor
Yoshiki Yoshida
Shigenori Mihara
Masayuki Mori
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.)
Sharp Corp
Original Assignee
Sharp 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 Sharp Corp filed Critical Sharp Corp
Priority to JP53079867A priority Critical patent/JPS5849898B2/en
Publication of JPS556691A publication Critical patent/JPS556691A/en
Publication of JPS5849898B2 publication Critical patent/JPS5849898B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Testing And Monitoring For Control Systems (AREA)
  • Programmable Controllers (AREA)

Abstract

PURPOSE:To make it possible to retrieve instruction information without using a coding sheet, by allowing a protective circuit to protect an address when input instruction information is detected coinciding with instruction information extracted from a program memory. CONSTITUTION:With retrieval indicated by retrieval indicating method 10, instruction read circuit 2 operates to read instruction information from program memory 1 in sequence. When coincidence detection circuit 4 detects this instruction information coinciding with instruction information set by instruction setter 11, the content of address counter 5 is protected by address protective circuit 12 at this time. Next, circuit 2 reads out instruction information from memory 1 in sequence on the basis of the address information of counter 5 and then sends it to initial instruction read circuit 7. In circuit 7, the instruction detects the variation of the output instruction from the initial instruction and the output of AND gate G3 is made zero to stop the operation of counter 5. At this time, the address of the initial instruction information among a sequence of instruction information set through previous instruction retrieval is protected in initial address circuit 13.
JP53079867A 1978-06-29 1978-06-29 Sequence controller monitor device Expired JPS5849898B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP53079867A JPS5849898B2 (en) 1978-06-29 1978-06-29 Sequence controller monitor device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53079867A JPS5849898B2 (en) 1978-06-29 1978-06-29 Sequence controller monitor device

Publications (2)

Publication Number Publication Date
JPS556691A true JPS556691A (en) 1980-01-18
JPS5849898B2 JPS5849898B2 (en) 1983-11-07

Family

ID=13702149

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53079867A Expired JPS5849898B2 (en) 1978-06-29 1978-06-29 Sequence controller monitor device

Country Status (1)

Country Link
JP (1) JPS5849898B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05241621A (en) * 1992-02-27 1993-09-21 Toyoda Mach Works Ltd Method for collating sequence program

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05241621A (en) * 1992-02-27 1993-09-21 Toyoda Mach Works Ltd Method for collating sequence program

Also Published As

Publication number Publication date
JPS5849898B2 (en) 1983-11-07

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