Vaisala WMT700 - 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 (<STX>, start of transmission)
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 (<ETX>, end of transmission)
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