Easy Electronics xLogic Micro PLC - Page 254

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S2(breakcontact) Flowmonitor
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S3(breakcontact) Flowmonitor
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H1 Flashinglamp
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H2 Flashinglamp
xLogicSoftsolution
TheuseofxLogicreducestheamountofswitchgear.Thus,yousaveinstallationtimeandspaceinthe
controlcabinet.Youmayevenbeabletouseasasmallercontrolcabinet.
WithxLogicyoucanalsoswitchoffofthefanssequentiallyafterthesystemisswitchedoff.
ThecircuitinxLogicSoft
ThesystemisswitchedonandoffattheinputsI1andI2.ThefansareconnectedtooutputsQ1andQ2,
theflowsensorsareconnectedtotheinputsI3andI4.BlocksB07andB10areusedtosetthewatchdog
timesafterwhichtheflowsensorsshouldsendasignaltothefaultoutputQ3.
YoucaninvertoutputQ3touseoutputmessagesatQ4.RelayQ4onlydropsoutifmainpowerislostor
ifthereisafaultinthesystem.Theoutputcanthenbeusedforaremotemessage.