Memory-programmable controller

Details Memory-programmable controller Memory-programmable controller

1984-01-04

1989-08-01

Eng, David Y.

Boots, shoes, and leggings

G06F 1200

Patent

active

048538914

ABSTRACT:
A memory-programmable controller is disclosed having a bit and word processor for controlling a peripheral process. A process control program is stored in a user program memory. The controller includes a data memory in which process images of the controlled process are stored. A supplemental memory is coupled in parallel with the data memory. Bit-wide data is stored in the data memory and change bits associated with individual ones of the bit wide data in the data memory are stored in the supplemental memory. The change bits determine whether the associated bit in the data memory can be changed during processing by the control program. Definite control states can thereby be simulated for test purposes.

REFERENCES:
patent: 3422401 (1969-01-01), Lucking
patent: 3921146 (1975-11-01), Danco
patent: 3942158 (1976-03-01), Dummermuth
patent: 4058850 (1977-11-01), Sheikh
patent: 4064395 (1977-12-01), Schubeler et al.

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