Programmable logic controller system
US3975622A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 26, 1974 |
| Grant date | Aug 17, 1976 |
| Priority date | — |
| Expiry date | Apr 26, 1994 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/15049
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A logic programmer panel has been provided for programming a digital controller with instructions directly from a process representation of a process control system for directing the operation of the same. The digital controller has inputs and outputs for respectively sensing and controlling various stages of the process. The programming panel includes selectable means and defining indicia associated therewith for programming the computer with instructions in a human language format from the flow chart when the individual portions of the means are selected. The selectable switch means, each having a digital code associated therewith for converting the human language format of the associated instructions into a code instructions each code when read by the controller being effective to store the instructions within a memory portion of the controller so as to affect the instruction defined by the selection of the word indicia of the selectable means. The indicia are a set of vocabulary words derived from the process representation which define the portions of the process. The words include the following: Out; sets the status of devices in accordance with an IF or a Test instruction. I…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.