Campbell Scientific CR1000KD CR800 and CR850 Measurement and Control Systems - Page 227

Section 7. Installation 'Declarations Public rTime(9) As Long Public rTime2(7) As Long Dim x DataTable(SecondTable,True,-1) DataInterval(0,5,Sec,10) Sample(1,rTime,NSEC) Sample(1,rTime2,NSEC) EndTable 'Program BeginProg Scan(1,Sec,0,0) RealTime(rTime) For x = 1 To 7 rTime2(x) = rTime(x) Next CallTable SecondTable NextScan EndProg '(or Float) '(or Float) CRBasic Example 46. NSEC -Convert Timestamp to Universal Time 'Application: the CR800 needs to display Universal Time (UT) in human readable 'string forms. The CR800 can calculate UT by adding the appropriate offset to a 'standard time stamp. Adding offsets requires the time stamp be converted to numeric 'form, the offset applied, then the new time be converted back to string forms. 'These are accomplished by, '1) reading Public.TimeStamp into a LONG numeric variable. '2) store it into a type NSEC datum in final data storage. '3) sample it back into string form using the TableName.FieldName notation. 'Declarations Public UTTime(3) As String * 30 Dim TimeLong As Long Const UTC_Offset = -7 * 3600 '-7 hours offset (as seconds) DataTable(TimeTable,true,1) Sample(1,TimeLong,Nsec) EndTable 'Program BeginProg Scan(1,Sec,0,0) '1) read Public.TimeStamp into a LONG numeric variable. TimeLong = Public.TimeStamp(1,1) + UTC_Offset '2) store it into a type NSEC datum in Final Data Storage. CallTable(TimeTable) 227