PROGRAMMABLE CONTROLLER

PROBLEM TO BE SOLVED: To speedily detect a software run away and speedily take measures against trouble after disconnecting a faulty system immediately. SOLUTION: A sequence engine 22 always judges whether or not trouble occurs on a handshake basis. The sequence engine 22 if detecting trouble inhibi...

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Hauptverfasser:	NAKADA GOJI, ICHIMURA KATSUHIKO
Format:	Patent
Sprache:	eng
Schlagworte:	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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creator	NAKADA GOJI ICHIMURA KATSUHIKO
description	PROBLEM TO BE SOLVED: To speedily detect a software run away and speedily take measures against trouble after disconnecting a faulty system immediately. SOLUTION: A sequence engine 22 always judges whether or not trouble occurs on a handshake basis. The sequence engine 22 if detecting trouble inhibits an MPU 1 from accessing an I/O memory 5 by using a bus controller 21. Then the sequence engine 22 judges whether or not write address is needed to stops software PLC itself and ends the process when the write access is not necessary, and further judges whether or not I/O update is needed when the write access is necessary. The sequence engine 22 when judging the I/O update is necessary updates the I/O memory 5. When it is judged that the I/O update is not necessary, on the other hand, the software PLC itself is stopped and the process is finished.
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SOLUTION: A sequence engine 22 always judges whether or not trouble occurs on a handshake basis. The sequence engine 22 if detecting trouble inhibits an MPU 1 from accessing an I/O memory 5 by using a bus controller 21. Then the sequence engine 22 judges whether or not write address is needed to stops software PLC itself and ends the process when the write access is not necessary, and further judges whether or not I/O update is needed when the write access is necessary. The sequence engine 22 when judging the I/O update is necessary updates the I/O memory 5. When it is judged that the I/O update is not necessary, on the other hand, the software PLC itself is stopped and the process is finished.</description><edition>6</edition><language>eng</language><subject>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</subject><creationdate>1998</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19980116&DB=EPODOC&CC=JP&NR=H1011325A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,780,885,25564,76547</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19980116&DB=EPODOC&CC=JP&NR=H1011325A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>NAKADA GOJI</creatorcontrib><creatorcontrib>ICHIMURA KATSUHIKO</creatorcontrib><title>PROGRAMMABLE CONTROLLER</title><description>PROBLEM TO BE SOLVED: To speedily detect a software run away and speedily take measures against trouble after disconnecting a faulty system immediately. SOLUTION: A sequence engine 22 always judges whether or not trouble occurs on a handshake basis. The sequence engine 22 if detecting trouble inhibits an MPU 1 from accessing an I/O memory 5 by using a bus controller 21. Then the sequence engine 22 judges whether or not write address is needed to stops software PLC itself and ends the process when the write access is not necessary, and further judges whether or not I/O update is needed when the write access is necessary. The sequence engine 22 when judging the I/O update is necessary updates the I/O memory 5. 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SOLUTION: A sequence engine 22 always judges whether or not trouble occurs on a handshake basis. The sequence engine 22 if detecting trouble inhibits an MPU 1 from accessing an I/O memory 5 by using a bus controller 21. Then the sequence engine 22 judges whether or not write address is needed to stops software PLC itself and ends the process when the write access is not necessary, and further judges whether or not I/O update is needed when the write access is necessary. The sequence engine 22 when judging the I/O update is necessary updates the I/O memory 5. When it is judged that the I/O update is not necessary, on the other hand, the software PLC itself is stopped and the process is finished.</abstract><edition>6</edition><oa>free_for_read</oa></addata></record>
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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
title	PROGRAMMABLE CONTROLLER
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