Campbell CR6 Series, Руководство оператора

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Section 10. Troubleshooting
559
1
Except Average() outputs NAN
2
Except Average() outputs 0
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65535 in operating systems prior to v. 28
10.5.3.4 Output Processing and NAN
When a measurement or process results in NAN , any output process with
DisableVar = FALSE that includes an NAN measurement. For example,
Average(1,TC_TempC,FP2, False )
will result in NAN being stored as final-storage data for that interval.
However, if DisableVar is set to TRUE each time a measurement results in NAN ,
only non-NAN measurements will be included in the output process. CRBasic
example Using NAN to Filter Data
(p. 559)
demonstrates the use of conditional
statements to set DisableVar to TRUE as needed to filter NAN from output
processes.
Note If all measurements result in NAN , NAN will be stored as
final-storage data regardless of the use of DisableVar .
Using NAN to Filter Data
'This program example demonstrates the use of NAN to filter what data are used in output processing
functions such as
'averages, maxima, and minima.
'Declare Variables and Units
Public TC_RefC
Public TC_TempC
Public DisVar As Boolean
'Define Data Tables
DataTable (TempC_Data,True,-1)
DataInterval (0,30,Sec,10)
Average (1,TC_TempC,FP2,DisVar) 'Output process
EndTable
'Main Program
BeginProg
Scan (1,Sec,1,0)
'Measure Thermocouple Reference Temperature
PanelTemp (TC_RefC,250)
'Measure Thermocouple Temperature
TCDiff (TC_TempC,1,mV200,U1,TypeT,TC_RefC,True,0,15000,1.0,0)
'DisVar Filter
If TC_TempC = NAN Then
DisVar = True
Else
DisVar = False
EndIf