JPS556691A - Monitor unit of sequential controller - Google Patents
Monitor unit of sequential controllerInfo
- 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
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.
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)
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 |
-
1978
- 1978-06-29 JP JP53079867A patent/JPS5849898B2/en not_active Expired
Cited By (1)
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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