epro MMS 6000 - Page 19

 MMS6110Directionforuse
 Configuration  Page17
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

Listfields
Revolutionspercycle(stationary/instationary)
Measurementsperrevolution(stationary/instationary)
Thespeedrangesforthestationaryandtheinstationarymodearedefinedbythenominal
speedanditstolerancerangesandbythemaximumandminimumspeed,refertodiagram2.
Forthestationarymodethespeediswithinthetolerancerangeofthenominalspeed.The
instationaryspeedrangeisbetweentheSubspeedandthelowerlimitofthenominalspeed
andontheotherhandbetweentheupperlimitofthenominalspeedandtheOverspeed.
Thevaluesinthelistfieldsareonlyvalidifthespeedcontrolledmodehasbeencho-
sen.Dependingonthedefinedspeedvaluesandthechosenuppercut-offfrequencyandif
admittedbytheprocessingspeed,thevalueswillbeacceptedandmaybemodified.Atin-
correctvaluesthecorrespondingfieldisshownred.
ListfieldsMeasurementsperrevolutionservethedefiningofhowmanymeasure-
mentspershaftrevolutionshallbemade.Themax.numberofmeasurementsislimitedby
themaximumsamplefrequencyfs=5120Hz.
Fsx60

MPTmax=
max.speed

MPT=measurements/turn
max.speed=max.speedforthestationaryresp.
instationaryrange
Themax.speedinthestationarymode(nominalspeed+speedtolerance)andthechosen
valueformeasurementsperrevolutiondeterminetheuppercut-offfrequencyasshownin
diagram1.

0
250
500
750
1000
1250
1500
1750
2000
0
500
1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000 6500 7000 7500 8000 8500 9000 9500
10000
nominalspeed+tolerance(rpm)
Fmax(Hz)
FmaxMPT=4
FmaxMPT=8
FmaxMPT=16
FmaxMPT=32
FmaxMPU=64
FmaxMPU=128
Max.frequencyrangeatnominalspeed+tolerance
(withspeedcontrolmode)
MPT=Measuring/turn
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Diagram1
Ifnecessary,athighnominalspeedstheuppercut-offfrequencymustbereduced,whenthe
presettingsformeasurementsperrevolutionaretoohighortoolow.
Inlistfieldsrevolutionspercyclethedefinitionofhowmanyrevolutionsaretakenfor
onemeasuringcyclecanbefound.Ifthisnumberismultipliedwiththenumberofmeasure-
mentsperrevolution,theresultisthetotalnumberofmeasurementspermeasuring
cycle.