Vaisala PTB210 SERIES Manuel d'instructions télécharger pdf (Page 40)

In the programming of the weather station all constants such as calibraiton factors,

oﬀsets and ASCII text commands are stored in an external data ﬁle on the CF

card. For detailed information of source code see appendix B on page 85. It is

itegrated within the normal program sequence through a simple include command

for execution. The example below shows the procedure of declaring constants.

Const = CR = CHR(13)

Const = LF = CHR(10)

Const = Command = ".P" + CR + LF

Const = wind_multiplier = 0.03125

Const = wind_offset = -12.5

The ﬁrst part distinguishes the combination of commands like carriage return CHR(13)

and line feed CHR(10) with operating commands to a single instruction named

"Command". The characters were taken from the library of CRBASIC. This in-

struction can be sent through a serial line to operate sensors, in this case, the digital

PTB210 barometers from Vaisala.

Every analog sensors uses its proper multiplier and oﬀset for converting the analog

voltage into real units like demonstrated. For details see section 4.5.1 on page 49.

4.4 Data Tables

Data are stored in tables as directed by the CR1000’s CRBASIC program. A data

table is created by a series of CRBASIC instructions which are entered after variable

declarations but before the main program. These intructions include:

DataTable() / EndTable

Output Trigger Condition(s)

Output Processing Instrucions

EndTable Instruction

A data table is essentially a ﬁle resides in CR1000 memory. The ﬁle is written to

each time data are directed to that ﬁle.

1 2 ... 35 36 37 38 39 40 41 42 43 44 45 ... 136 137

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Vaisala PTB210 SERIES Manuel d'instructions Page 40