Vaisala WXT520 Guia do Utilizador descarregar pdf (Página 80)

User’s Guide ______________________________________________________________________

78 __________________________________________________________________ M210906EN-C

Example of asking the CRC for the wind data message query ar1:

Command format: ar1yyy<cr><lf>

Response:

atX,Use chksum GoeIU~<cr><lf>

Example of the other data query commands with CRC (when the

device address is 0):

In every case the response contains a three-character CRC before the

<cr><lf>.

For selecting the parameters to be included in the response messages,

changing the units and making other configurations of the measured

parameters, see Chapter 8, Sensor and Data Message Settings, on page

107.

where

a = Device address

r1 = Wind message query command

yyy = Arbitrary three-character CRC

<cr><lf> = Command terminator

where

a = Device address

tX,Use

chksum

= Text prompt

Goe = Correct three-character CRC for the ar1 command

IU~ = Three-character CRC for the response message

<cr><lf> = Response terminator

Pressure, humidity and

temperature message query

= 0r2Gje<cr><lf>

Precipitation query = 0r3Kid<cr><lf>

Supervisor query = 0r5Kcd<cr><lf>

Combined message query = 0rBVT<cr><lf>

Composite data message query = 0r0Kld<cr><lf>

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Vaisala WXT520 Guia do Utilizador Página 80