USER'S GUIDE____________________________________________________________________
50 __________________________________________________________________ M210543EN-E
Message Types
Message 2 is intended to be the standard present weather message. The
length of the STAtus Message 3 depends on the possible alarm and
warning states.
PWD22/52 adds frame strings to the polled and automatic messages. The
content of the frame strings is presented in the following:
S
H
PW id
S
X
message body
E
X
C
R
L
F
where
S
H
= Start of heading (ASCII 1, non-printable character).
PW = PWD sensor identifier.
= Space character.
id = Unit identifier, 2 characters. If the ID is not defined, characters
space and 1 are shown.
S
X
= Start of text (ASCII 2, non-printable character).
message body
E
X
= End of text (ASCII 3, non-printable character).
C
R
L
F
= CR + LF (ASCII 13 + ASCII 10).
The contents of messages 0, 1, and 2 are illustrated in Figure 16 below.
10 680 1230 ← THE FIRST ROW IS THE OUTPUT
↓↓ ↓ ↓
------ 10 min ave visibility FIELD
------- one minute average visibility DESCRIPTIONS
- 1=hardware error, 2= hardware warning,
3= backscatter alarm, 4= backscatter warning
- 1= visibility alarm 1, 2= visibility alarm 2,
3 = visibility alarm 3
Example with frames
□PW 1□ 00 680 1230□
S
H
PW 1
S
X
00 680 1230
E
X
C
R
L
F
1234567890123456789012345
NUMBERS mark the character positions.
Figure 16 Illustration of Contents of Messages 0, 1, and 2
To Next Page
Loading...
Need help?
General
