Vaisala WMT700 User Manual
Page 59
Chapter 5 ______________________________ Operating WMT700 with WS425 and SDI-12 profiles
VAISALA _______________________________________________________________________ 57
WMT700 responds to the Wx command with a 19-character fixed-length
data message. For more information, see Table 19 below.
Table 19
WS425 A/B ASCII Data Message
Character Description
1
┐ 02H (
2 W
3
Averaging in seconds.
4 Status:
P = pass
F = fail
5
Wind direction (most significant digit)
6
Wind direction (middle digit)
7
Wind direction (least significant digit)
8
Wind speed (most significant digit)
9
Wind speed (next digit)
10
Wind speed (next digit)
11
Wind speed (least significant digit)
12
. (dot character)
13
Wind speed (tenth digit)
14 Wind
speed
unit:
M = miles per hour
K= knots
L = kilometers per hour
T = meters per second
15
Checksum (most significant digit). For more information, see the
note below.
16
Checksum (least significant digit)
17
└ 03H (
18 CR
(carriage
return)
19
LF (line feed)
NOTE
The checksum is calculated from the characters from position 2 to 14.
The accumulator initializes at 0 with the addition of the byte value. The
checksum has a range of 0H … FFH.
Example of the command and response:
W5
W5P1200013.2TDE