MasterclockGMRUserManualv2–2016.12
60
clockQuality.offsetScaledLogVariance–precalculatedvaluesetatfactory,200ns
Thefollowingcanbemodified:
twoStepFlag–iftrue,twostepisenabled,iffalse,onestepisused.
priority1andpriority2‐Priorityisoneofseveralparametersusedtodeterminewhichdeviceonthe
networkwillbethegrandmaster.The
lowerthenumber,thehighertheprioritywithpriority0beingthe
highest.Therangeofvaluesis0‐255.Priority#1isusedearlyinthegrandmasterselectionprocess.
Priority#2occurslateintheselectionprocess.
domainnumber‐AdomainconsistsofoneormorePTPdevicescommunicatingwith
eachother.The
defaultdomainforPTPdevicesisdomain“0”.Multipledomainsareallowedandtheinputrangeis0to
127.AlldeviceswillreceiveallPTPpacketsbuttheywillonlyprocessandrespondtopacketswithintheir
configureddomainnumber.
slaveonly–false,thisdevice
canbecomethegrandmaster(basedontheBestMasterClock(BMC)
algorithm.True,thisdevicecanonlybeaslave.
2)currentDS,CurrentDataSet
Nomemberscanbemodified.Select’x’togobackupalevel,‘?’forhelp
Thefollowingcannotbemodified:
stepsRemoved–thenumberofdevicesbetweenthisdeviceandthemasterstartingwiththe
valueof1(thisdevice).
offsetFromMaster–calculatedtimedifferencebetweenthisdeviceandthe
master.
meanPathDelay–calculationofthenetworkpathdelaybetweenthisdeviceandthemaster
3)parentDS,ParentDataSet
Nomemberscanbemodified.Select’x’togobackupalevel,‘?’forhelp
Thefollowingcannotbemodified:
parentPortIdentity–identityofthecurrentparent
parentStats–notused
observedParentOffsetScaledLogVariance–notused
observedParentClockPhaseChangeRate–notused
grandmasterIdentity–identityofthecurrentgrandmaster
grandmasterClockQuality‐ForGMRproducts,
seepreviousdefinitioninthedefaultdataset.
Non‐GMRproductsmayhaveadditionalvalues.
grandmasterPriority1andgrandmasterPriority2–seepreviousdefinitioninthedefaultdataset.
4)timepropertiesDS,TimePropertiesDataSet
Selectwhichmembertomodify(1‐4),’x’togobackupalevel,‘?’forhelp
Thefollowingcannotbemodified:
timeTraceable–true,thecurrenttimeistraceable.False,thecurrenttimeisnottraceable.
frequencyTraceable–true,thecurrentfrequencyistraceable.False,thecurrentfrequencyisnot
traceable.
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