July 2004
Intermediate to advanced
352 pages
9h 30m
English
Content preview from Mitsubishi FX Programmable Logic Controllers, 2nd Edition
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//INTEGRAS/ELS/PAGINATION/ELSEVIER UK/PLC/3B2/FINALS-7-6-04/ 0750656794-CH018.3D – 180 – [180–194/15]
19.6.2004 9:15PM
18
Trace
Traceisamethodbywhichhistoricaltrendgraphscanbeproduced.
Thedisplayscanshowgraphicallytheoperationsofselectedinput/outputdevices
andalsothevaluesstoredintimers,countersanddataregisters.
Itisusedinfaultfindingrapidlychangingsignals,whichcannotbeobservedwith
input/outputLEDsandcanbeusedtodisplaythelogicconditionsofinput/output
devicesandthecontentsoftimers,countersandregistersbeforeandaftertheoccur-
renceofthefaultcondition.
TodemonstratetheTracefacility,projectPNEU4willbeused.
18.1Principleofoperation
Blockdiagram^Multi-channel
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