Campbell CR3000 Micrologger, Руководство оператора

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Section 7. Installation
313
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Tip — concatenate (add) strings together using & instead of +.
o
Tip — use CHR() instruction to insert ASCII / ANSI characters into
a string.
3. Output string via the serial port (SerialOut() or SerialOutBlock() command).
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Example:
SerialOut (Com1,SerialOutString,"",0,100)
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Declare the output string variable large enough to hold the entire
concatenation.
o
Example:
Public SerialOutString As String * 100
•
SerialOut() and SerialOutBlock() output the same data, except that
SerialOutBlock() transmits null values while SerialOut() strings are
terminated by a null value.
7.7.18.5.4 Serial I/O Translating Bytes
One or more of three principle data formats may end up in the SerialInString()
variable (see examples in Serial Input Programming Basics
(p. 311)
). Data may be
combinations or variations of these. The instrument manufacturer must provide
the rules for decoding the data
•
Alpha-numeric — Each digit represents an alpha-numeric value. For
ex
ample, R = the letter R, and 2 = decimal 2. This is the easiest
protocol to translate since the encode and translation are identical.
Normally, the CR3000 is programmed to parse (split) the string and
place values in variables.
Example string from humidity, temperature, and pressure sensor:
SerialInString = "RH= 60.5 %RH T= 23.7 °C Tdf= 15.6 °C Td=
15.6 °C a= 13.0 g/m3 x= 11.1 g/kg Tw= 18.5 °C H2O=
17889 ppmV pw=17.81 hPa pws 29.43 hPa h= 52.3 kJ/kg dT=
8.1 °C"
•
Hex Pairs — Bytes are translated to hex pairs, consisting of digits 0 to 9
and letters a to f. Each pair describes a hexadecimal ASCII / ANSI code.
Some codes translate to alpha-numeric values, others to symbols or non-
printable control characters.
Example sting from temperature sensor:
SerialInString = "23 30 31 38 34 0D"
which translates to
#01 84 cr