Dataportal - Internal Data
The script below demonstrates how to use the channel group and channel manipulation commands.
from DIAdem import Application as dd
if False:
import DIAdem_CodeCompletion as dd
# --------------------------------------------------------------------
dd.LogfileDel()
print('Script "LastScript.PY')
# --------------------------------------------------------------------
def ChnRemove(oChn):
#Removes the channel oChn.
oElementList = dd.Data.GetChannels(oChn.GetReference(dd.eReferenceNameName))
dd.Data.Remove(oElementList)
def bTestDIAdemScriptEnv():
dd.Data.Root.Clear()
dd.Data.Root.Name = "bTestDIAdemScriptEnv"
oGrp = dd.Data.Root.ChannelGroups.Add("MyChnGrp1")
#print('oGrp.Name = ' + oGrp.Name)
#Create a time channel
oChnX = oGrp.Channels.Add("Time",dd.DataTypeFloat64) #dd.DataTypeFloat64, dd.DataTypeString, dd.DataTypeChnDate
dd.ChnLinGen(oChnX, 0, 500, 100, 's')
#print(oChnX.GetReference(dd.eRefTypeNameName) + ' max: ' + str(oChnX.Properties("maximum").value))
#Create date/time channel
oChnDateTime = oGrp.Channels.AddChannel(oChnX)
oChnDateTime.Name = "DateTime"
#Define the datetime offset.
import datetime
current_time = datetime.datetime.now()
#oUsiLocal = dd.CreateTime(current_time.year, current_time.month, current_time.day, current_time.hour, current_time.minute, current_time.second, current_time.microsecond)
oUsiLocal = dd.CreateTime(current_time.year, current_time.month, current_time.day, current_time.hour, current_time.minute, current_time.second)
#Convert the numeric channel oChnDateTime to a channel data type of time (date/time).
dd.ChnNumericToTime(oChnDateTime, oUsiLocal.GetUTC.SecondsFrom0000 + oUsiLocal.Fraction, False)
oChnDateTime.Properties.Add('description', 'Derived from channel "time"')
#Create a numeric channel
oChnY = oGrp.Channels.Add("Numeric",dd.DataTypeFloat64)
#ChnGenVal(ChnArg1, ChnRow, ValNo, ChnBegin, ChnStep
dd.ChnGenVal(oChnY, 1, 100, 0.0, 1.0/33.0)
oChnY.XRelation = oChnX
oChnY.UnitSymbol = 'psi'
#print(oChnY.GetReference(dd.eRefTypeNameName) + ' max: ' + str(oChnY.Properties("maximum").value))
#Update the 2nd value/row in oChnY to be 0.30
oChnY.SetValues(0.30, 2)
#Create a waveform channel
oChnWf = oGrp.Channels.AddChannel(oChnY)
oChnWf.Name = "Waveform"
dd.ChnToWfChn(oChnDateTime, oChnWf, False, "WfXAbsolute")
#Create a numeric channel from the waveform channel oChnWf
oChnY = oGrp.Channels.AddChannel(oChnWf)
oChnY.Name = "NumericFromWf"
oElementList = dd.WfChnToChn(oChnY, True, "WfXAbsolute")
oElementList.Item(1).Name = "DateTimeNumericFromWf"
#Remove all of the channels just created
"""
for c in range(oGrp.Channels.Count, 0, -1):
print('\tRemoving channel ' + oGrp.Channels.Item(c).Name)
oChn = oGrp.Channels.Item(c)
#dd.Data.Remove(dd.Data.GetChannels(oChn.GetReference(dd.eReferenceNameName))
ChnRemove(oChn)
#Remove the channel group
dd.Data.Root.ChannelGroups.Remove(oGrp.Name)
"""
dd.Portal.Refresh()
bTestDIAdemScriptEnv()
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