Method and apparatus for partially running a sequence program for debugging thereof
US5218525A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 8, 1991 |
| Grant date | Jun 8, 1993 |
| Priority date | — |
| Expiry date | Feb 8, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/348
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for debugging a sequence program by partially running the program by a programmable controller. The programmable controller includes memory to store the sequence program and memory to store partial run conditions comprising identity of a external device required for a partial run of the sequence program, a device access method and relevant data. An external i/o device interfaces with the programmable controller to store the partial run condition. The programmable controller includes a compare circuit for comparing the stored partial run conditions and the status of the program during a partial run. The comparison circuit outputs a signal which stops the run when the result of the sequence program operation is identical with the stored partial run conditions. The stop step and number of scans of the sequence program at the time the match is identified can be output for example, on a display.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.