7.8.4.9 Numerical Formats
Four numerical formats are supported by CRBasic. Most common is the use of
base-10 numbers. Scientific notation, binary, and hexadecimal formats can also
be used, as shown in the table Formats for Entering Numbers in CRBasic
(p. 139).
Only standard, base-10 notation is supported by Campbell Scientific hardware and
software displays.
Table 13. Formats for Entering Numbers in CRBasic
Format Example Base-10 Equivalent Value
Standard 6.832 6.832
Scientific notation 5.67E-8
5.67X10
-8
Binary &B1101 13
Hexadecimal &HFF 255
Binary format (1 = high, 0 = low) is useful when loading the status of multiple
flags or ports into a single variable. For example, storing the binary number
&B11100000 preserves the status of flags 8 through 1: flags 1 to 5 are low, 6 to 8
are high. CRBasic example Load binary information into a variable
(p. 139) shows
an algorithm that loads binary status of flags into a LONG integer variable.
CRBasic Example 9. Load binary information into a variable
'This program example demonstrates how binary data are loaded into a variable. The binary
'format (1 = high, 0 = low) is useful when loading the status of multiple flags
'or ports into a single variable. For example, storing the binary number &B11100000
'preserves the status of flags 8 through 1: flags 1 to 5 are low, 6 to 8 are high.
'This example demonstrates an algorithm that loads binary status of flags into a LONG
'integer variable.
Public FlagInt As Long
Public Flag(8) As Boolean
Public I
DataTable(FlagOut,True,-1)
Sample(1,FlagInt,UINT2)
EndTable
BeginProg
Scan(1,Sec,3,0)
FlagInt = 0
For I = 1 To 8
If Flag(I) = true Then
FlagInt = FlagInt + 2 ^ (I - 1)
EndIf
Next I
CallTable FlagOut
NextScan
139
To Next Page
Loading...
