Programming method and programming unit for programmable controller in which only common names for application instructions need be designated by the programmer
US5995987A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 12, 1993 |
| Grant date | Nov 30, 1999 |
| Priority date | — |
| Expiry date | Oct 12, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P90/02
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A programming system for a programmable controller is improved by providing for automatic retrieval of the execution programs corresponding to application instructions which do not form a part of the basic program instruction set. Application instructions embedded within a sequence program are recognized and their common operation names are displayed on the operator's display. The corresponding execution instructions are retrieved and subsequently combined with the sequence program while the operator monitors the retrieval operation on the display. After the execution instructions have all been copied over into the memory for the sequence program, the application instructions may optionally be rewritten as standard subroutine instructions including the head address of the given set of execution instructions, to avoid the need for a symbol table to interpret between application instruction names and the corresponding head address for the execution instructions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.