Chapter 4 _________________________________________________________________ Operation
VAISALA ________________________________________________________________________ 63
Message_interval
- Given in multiples of 15 seconds (= measuring interval).
Therefore, intervals 15, 30, 45 ... are valid. Other intervals
are converted to multiples of 15 seconds. The maximum
sending interval is 255 seconds (4 minutes 15 seconds).
For example, typing
AMES 1 60
↵
selects message number 1 to be sent once in a minute.
Messages can also be displayed in the command mode with the MES
command, described in section MES Command on page 71.
Message Types
All the data messages are of fixed length and the data is in fixed
fields. Message 2 is intended to be used as the standard present
weather message. The length of the status message depends on the
possible alarm and warning states.
The FD12P adds frame strings to the polled and automatic messages.
The content of the frame strings is presented in the following:
!
FD id
"
message body
#-*
where
!
= Start of heading (ASCII 1, non-printable character, in
terminal screen typically seen as the
□
mark)
FD
= FD12P sensor identifier
= Space character
id
= Unit identifier 2 characters, if ID is not defined
characters space and 1 are shown
"
= Start of text (ASCII 2, non-printable character)
#
= End of text (ASCII 3, non-printable character)
-*
= CR + LF (ASCII 13 + ASCII 10)
