Vaisala WINDCAP WS425 Guide de l'utilisateur télécharger pdf (Page 174)

User's Guide ______________________________________________________________________

aD0! — Send Data

This command fetches instant data from WMT700. aD0! must be

preceded by a C!, M!, or V! command. WMT700 responds by

sending measurement data (after C! or M!) or verification data

(after V!).

In a SDI-12 system compliant with the standard, if the expected

number of measurements is not returned in response to an aD0!

command, a data recorder issues D1!, D2!, and so on, until all

measurement values are received. The expected number of

measurements is included in the message that WMT700 sends in

response to an aC!, aM! or aV! command. Multiple data requests

are not needed with WMT700, since all return values fit easily

into one response string.

aD0!

where

Single-digit WMT700 address that corresponds to the

first character of the address value

Send data command

Terminates the command

For a description of the data messages, see section SDI-12 Data

Messages on page 176.

aI! — Send Identification

This command queries WMT700 for its SDI-12 compatibility

level, model number, and firmware version number.

aI!

where

Single-digit WMT700 address that corresponds to the

first character of the address value

Send identification command

Terminates the command

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Vaisala WINDCAP WS425 Guide de l'utilisateur Page 174