CR200/CR200X Series Dataloggers - Campbell Scientific
CR200/CR200X Series Dataloggers - Campbell Scientific
CR200/CR200X Series Dataloggers - Campbell Scientific
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Section 9. Programming<br />
TABLE. Predefined Constants and Reserved Words (p. 77) lists predefined<br />
constants.<br />
Table 7. Predefined Constants and Reserved Words<br />
Case Day DO FOR<br />
FALSE Hr If Msec<br />
min mv2500 mv5000 PROG<br />
SCAN Select SUB Sec<br />
TABLE TRUE Usec Until<br />
EX1 EX2 While<br />
9.6.3 Alias and Unit Declarations<br />
A variable can be assigned a second name, or alias, by which it can be called<br />
throughout the program. Aliasing is particularly useful when using arrays.<br />
Arrays are powerful features in complex programs, but place the same<br />
appellation on a number of variables. The use of an alias allows the power of the<br />
array to be used with the clarity of unique names.<br />
Each variable can be assigned units to clarify the meaning. Units are not used<br />
elsewhere in programming, but rather add meaning to resultant data table<br />
headers.<br />
CRBASIC EXAMPLE 7.<br />
Public TempC(2)<br />
Alias and Unit Declaration<br />
Alias TempC(1)=AirTempC<br />
Alias TempC(2)=SoilTempC<br />
Units TempC()=Deg_C<br />
BeginProg<br />
Scan (1,Sec)<br />
Therm109 (TempC(),2,1,Ex1,1.0,0)<br />
NextScan<br />
EndProg<br />
9.7 Declarations II - Declared Sequences<br />
9.7.1 Data Tables<br />
Data are stored in tables as directed by the CRBASIC program. A data table is<br />
created by a series of CRBASIC instructions entered after variable declarations<br />
but before the BeginProg instruction. These instructions include:<br />
77
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