Vaisala WINDCAP WS425 Guide de l'utilisateur télécharger pdf (Page 64)

TECHNICAL REFERENCE___________________________________________________________

62 __________________________________________________________________ M211097EN-C

SDI-12 Commands

Table 22 below lists the available commands for operating WMT700

with SDI-12 profile.

NOTE

You can only use COM2 serial port for sending commands and receiving

data messages with the SDI-12 profile.

Table 22 List of SDI-12 Commands

Command Description

?! Queries WMT700 for its address.

a! Ensures that WMT700 is responding.

aI! Queries WMT700 for its SDI-12 compatibility level, model number, and

firmware version number.

aAb! Changes WMT700 address.

aC! Starts concurrent measurement.

aCC! Starts concurrent measurement with CRC calculation.

aD0! Fetches instant data from WMT700.

aM! Starts measurement.

aMC! Starts measurement with CRC calculation.

aV! Starts verification.

where

a = The single-digit WMT700 address that corresponds to the first

character of the address value.

! = Terminates the command.

NOTE

The following SDI-12 commands cannot be used with WMT700:

Measurement Unit Change Command aXUx!, Heater Control Command

aXHx!, Check Current Sub mode aX?!, Place Sensor in Sub mode B

Command aXQx;c.c;n;yyyy!, Reset the Sensor to Sub mode A

Command aXS!, Check Current Measurement Unit Command aX*!,

aR0! Continuous Measurement.

For a list of configuration commands for WMT700, see Vaisala

WINDCAP

Ultrasonic Wind Sensor Series WMT700 User's Guide.

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Vaisala WINDCAP WS425 Guide de l'utilisateur Page 64