JPS5629701A - Sequence control device - Google Patents
Sequence control deviceInfo
- Publication number
- JPS5629701A JPS5629701A JP10481279A JP10481279A JPS5629701A JP S5629701 A JPS5629701 A JP S5629701A JP 10481279 A JP10481279 A JP 10481279A JP 10481279 A JP10481279 A JP 10481279A JP S5629701 A JPS5629701 A JP S5629701A
- Authority
- JP
- Japan
- Prior art keywords
- address
- program
- original program
- end instruction
- instruction
- 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
Landscapes
- Programmable Controllers (AREA)
Abstract
PURPOSE: To enable an alteration under operation of the sequence control, by skipping the instruction of the final address of the decoded original program and then connecting the program to be altered to the original program.
CONSTITUTION: The timing control circuit 9 switches during the 1-instruction executing timing the address designation of the memory 2 to the contents designated by the address register 8 throught the selecting circuit 11, writes the contents of data register 10 into the memory 2 and then returns the address designation to the program counter 1 immediately after the completion of the writing. In other words, the additional programs are written sequentially into the original program, and finally the END instruction is written. After this the switch 13 is turned on. Thus the first END instruction given from the initial address is skipped and then added to the original program via the final address control circuit 12. Then the additional programs are carried out to be returned to the initial address each by the END instruction of each additional program. The switch 13 is turned off after confirmation, and then the END instruction of the original program is rewritten to an inffective state. In such way, an alterlation is possible with no discontinuation of the sequence control.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10481279A JPS5629701A (en) | 1979-08-16 | 1979-08-16 | Sequence control device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10481279A JPS5629701A (en) | 1979-08-16 | 1979-08-16 | Sequence control device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5629701A true JPS5629701A (en) | 1981-03-25 |
Family
ID=14390819
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10481279A Pending JPS5629701A (en) | 1979-08-16 | 1979-08-16 | Sequence control device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5629701A (en) |
-
1979
- 1979-08-16 JP JP10481279A patent/JPS5629701A/en active Pending
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