Method and apparatus for creating custom displays for monitoring ladder logic programs
US4991076A · kind A · utility
50Cited by
30References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 30, 1989 |
| Grant date | Feb 5, 1991 |
| Priority date | — |
| Expiry date | Jun 30, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/13125
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
The present invention provides productivity aids for ladder logic programs for Programmable Logic Controllers (PLCs). The present invention discloses a software package embodying a method of creating custom screens for displaying the values and status of bits and words in a PLC as a ladder logic program executing therein is monitored. Any combination of bits and words can be displayed by the custom screens. This Custom Data Monitor function is designed to simplify troubleshooting by giving the user the tools to develop screens that act as windows into user-selected Data Table locations in the PLC.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.