Memory system for programmable controller

Details Memory system for programmable controller Memory system for programmable controller

G - Physics

06

F

354/246

G06F 13/00 (2006.01) G05B 19/05 (2006.01) G06F 9/24 (2006.01) G06F 12/06 (2006.01) G11C 16/10 (2006.01)

Patent

CA 1139891

ABSTRACT OF THE DISCLOSURE In a programmable controller having a central processor unit and a memory, the invention provides the memory in the form of a fast memory (suitably a RAM) and a slow memory (suitably an EAROM). The processor is normally controlled by program information in the slow memory. When it is desired to alter the control program, new program information is loaded into the fast memory. Control is then transferred to the fast memory, the new program information transferred to the slow memory, and control returned to the slow memory.

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