EnerSys Alpha Cordex CXC HP - Start Logic; Stop Logic

Cordex®CXCHPControllerSoftwareManual|14-Generator
14.5.1. Start logic
TheStart Logic choicedecideswhetherjustone,orallstartconditionsmustbetruefortheCall to Start
tobecometrue.Thisdecideshowthestartconditionswillbeassembledintoalogicalequation.
TheStart Equation isanautomaticallywrittenequationofalltheenabledstartconditions.Ifthereis
morethenonestartcondition,theequationwillbeassembledwith'&'or'|'symbolsaccordingtothe
Start Logic.IfallstartconditionsmustbetruefortheStart Equation toevaluatetotrue,thenthe
equationwillbewrittenas"MyStartCondition1&MyStartCondition2".Ifjustonestartconditionmustbe
truefortheStart Equation toevaluatetotrue,thentheequationwillbewrittenas"MyStartCondition1|
MyStartCondition2".
TheCall to Start isbasedonthelogicalresultoftheStart Equation,astrueorfalse.Forexample,
ifastartconditioncausestheStart Equation tochangefromfalsetotrue,thentheCall to Start will
begincountingdownfortheconfigureddurationoftheEquation Stability Delay.IftheStart Equation
continuestoevaluateastruethroughthewholestabilitydelay,thentheCall to Start willbecomeTrue.
Otherwise,iftheStart Equation evaluatesasfalseatanypointduringthestabilitydelay,thecountdown
willstop,andtheCall to Start willremainFalse.
Notice: The Call to Start will always be evaluating the start conditions, even when the
Generator Control is Disabled, so that the user can test the logic without starting the generator.
Furthermore, the Call to Start will be evaluated even while the generator is running. If the Call
to Start is True when the generator shuts down, the generator will immediately startup again.
Therefore, care should be taken when defining start and stop conditions so that they do not
interfere with each other.
14.5.2. Stop logic
TheStop Logic choicedecideswhetherjustone,orallstopconditionsmustbetruefortheCall to Stop
tobecometrue.Thisdecideshowthestopconditionswillbeassembledintoalogicalequation.
TheStop Equation isanautomaticallywrittenequationofalltheenabledstopconditions.Ifthereis
morethenonestopcondition,theequationwillbeassembledwith'&'or'|'symbolsaccordingtothe
Stop Logic.IfallstopconditionsmustbetruefortheStop Equation toevaluatetotrue,thenthe
equationwillbewrittenas"MyStopCondition1&MyStopCondition2".Ifjustonestopconditionmustbe
truefortheStop Equation toevaluatetotrue,thentheequationwillbewrittenas"MyStopCondition1|
MyStopCondition2".
TheCall to Stop isbasedonthelogicalresultoftheStop Equation,astrueorfalse.Forexample,
ifastopconditioncausestheStop Equation tochangefromfalsetotrue,thentheCall to Stop will
begincountingdownfortheconfigureddurationoftheEquation Stability Delay.IftheStop Equation
continuestoevaluateastruethroughthewholestabilitydelay,thentheCall to Stop willbecomeTrue.
Otherwise,iftheStop Equation evaluatesasfalseatanypointduringthestabilitydelay,thecountdown
willstop,andtheCall to Stop willremainFalse.
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