PROGRAMMABLE CONTROLLER

PROBLEM TO BE SOLVED: To hold a user program for a long period in a power-off state and to make the execution speed fast. SOLUTION: A source program and held variables are stored in a low-speed RAM which is backed up by a battery and an object program and unheld variables are stored in a high-speed...

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Bibliographic Details
Main Author OTANI SHUJI
Format Patent
LanguageEnglish
Published 18.01.2002
Edition7
Subjects
CALCULATING
COMPUTING
CONTROL OR REGULATING SYSTEMS IN GENERAL
CONTROLLING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
FUNCTIONAL ELEMENTS OF SUCH SYSTEMS
MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS ORELEMENTS
PHYSICS
REGULATING
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Summary:PROBLEM TO BE SOLVED: To hold a user program for a long period in a power-off state and to make the execution speed fast. SOLUTION: A source program and held variables are stored in a low-speed RAM which is backed up by a battery and an object program and unheld variables are stored in a high-speed RAM or an MPU-incorporated RAM respectively.
Bibliography:Application Number: JP20000195131