JPS5783807A - Programmable logic controller - Google Patents

Programmable logic controller

Info

Publication number
JPS5783807A
JPS5783807A JP16035480A JP16035480A JPS5783807A JP S5783807 A JPS5783807 A JP S5783807A JP 16035480 A JP16035480 A JP 16035480A JP 16035480 A JP16035480 A JP 16035480A JP S5783807 A JPS5783807 A JP S5783807A
Authority
JP
Japan
Prior art keywords
memory
word
instruction
program
data
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
JP16035480A
Other languages
Japanese (ja)
Other versions
JPS6116085B2 (en
Inventor
Yukio Kato
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.)
Omron Corp
Original Assignee
Tateisi Electronics Co
Omron Tateisi Electronics Co
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 Tateisi Electronics Co, Omron Tateisi Electronics Co filed Critical Tateisi Electronics Co
Priority to JP16035480A priority Critical patent/JPS5783807A/en
Publication of JPS5783807A publication Critical patent/JPS5783807A/en
Publication of JPS6116085B2 publication Critical patent/JPS6116085B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
    • G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Executing Machine-Instructions (AREA)
  • Programmable Controllers (AREA)

Abstract

PURPOSE:To discriminate a two-word instruction in the reverse monitor without changing the instruction word length, by providing a discrimination signal memory addressed in parallel with a program memory by a programmable logic controller (PLC). CONSTITUTION:In the PLC where a two-word instruction where an instruction code and an element number are entered in the first word and numerical data is entered in the second word is defined, a discrimination signal memory 9 which have the same number of words, every one of which consists of a one-bit RAM, as a user program memory 1 is so provided that this memory 9 is addressed in parallel with the memory 1. Before the program execution, a monitor control part 5 reads out respective instructions of the memory 1 successively and decides whether numerical data of the second word constituting a two-word instruction exists or not successively and writes decision results in corresponding addresses of the memory 9. On a basis of data read out from the memory 9, it is discriminated whether the instruction read out from the memory 1 at the program monitor time is data of the second word constituting a two-word instruction or not.
JP16035480A 1980-11-14 1980-11-14 Programmable logic controller Granted JPS5783807A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16035480A JPS5783807A (en) 1980-11-14 1980-11-14 Programmable logic controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16035480A JPS5783807A (en) 1980-11-14 1980-11-14 Programmable logic controller

Publications (2)

Publication Number Publication Date
JPS5783807A true JPS5783807A (en) 1982-05-25
JPS6116085B2 JPS6116085B2 (en) 1986-04-28

Family

ID=15713154

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16035480A Granted JPS5783807A (en) 1980-11-14 1980-11-14 Programmable logic controller

Country Status (1)

Country Link
JP (1) JPS5783807A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56121152A (en) * 1980-02-27 1981-09-22 Hitachi Ltd Monitor system of computer program

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56121152A (en) * 1980-02-27 1981-09-22 Hitachi Ltd Monitor system of computer program

Also Published As

Publication number Publication date
JPS6116085B2 (en) 1986-04-28

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