epro MMS 6000 - Alarm blocking; External blocking; alarm stop; Response delay; Condition monitoring

 MMS6110Directionforuse 
 Functiondescription  Page35
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4.4.7 Alarmblocking
SwitchesoffalarmLEDsandsetsthealarmoutputstothedefaultstate.Thealarmblocking
functionalwaysgetsactiveinthefollowingcases.
• Atmodulefaults(supplyorsoftwarefailures).
• During runningdelay times after power-onor powerbreaksandduringa timeof18 +
60sec.aftermoduleconfigurations
• Attemperaturemainalarm
• Ifexternalblockingisactive(inputESz22setto0V).
Thealarmblockingfunctionwillonlygetactiveincaseameasuringchainfailstooperate
(inputdclevel<measuringchainoperatingrange,lowerlimit-0,5Vor>upperlimit+0.5V)
andduringthedelaytimeafterremedyingthisdisturbance,ifinpropertypageBasispa-
rameterswitchLimitvaluesuppressionhasbeenactivated.
ThemeasuringchainerrormessageOverload(dyn.Inputvoltage>measuringrange)
doesnothaveanyinfluenceonthealarmblocking.
InDisplayDevicestatusoftheconfigurationprogramallstatesareindicated,section
4.5.5showsthemodulesupervisioninaclearform.
4.4.8 Externalblocking/alarmstop
Ifinputexternalblockingz22issetittoLOW(0V/ground),thealarmoutputwillbedeacti-
vated–independentlyofthealarmconfiguration:Alarm-LEDsareswitchedoffandalarm
outputsaresettotheirdefaultstate.Moreover,the"ChannelClear"LEDswillbeswitchedoff
andtherelevantcollector-emitteroutputsopened(closedcircuitmode).
IftheinputisopenorHIGH(+24V),thealarmswillnotbeblockedresp.onlybythefaultsas
describedinsection4.4.7.TheactualstateofsignalExternallockingcanbefoundin
menuDevicestatusoftheconfigurationprogram.
4.4.9 Responsedelay
Theresponsedelaymaybeadjustedintherange0...5secondsbymeansoftheconfigurati-
onsoftware.Theresponsedelaytimeindicates,howlongalimitvaluemustbeexceededby
themeasuringvaluebeforeanalarmistriggered.
4.5 Conditionmonitoring
Theconditionsupervisionfunctionchecksthefunctionalityofmonitorandmeasuringchains.
Thisfunctionshallensurethatincaseoffaultymeasurementsthisisindicatedand,ifneces-
sary,theoutputofalarmsdeactivated.
Indicationoftheconditionismadeinthreeways
• bymeansoftheChannelClearLEDsonthefront
• bymeansofChannelClearoutputs1and2
• bymeansoftheconfigurationprogramonacomputerinmenuDiagnosis-device
status.