Vaisala LT31 - Automatic Mode; Message 9 - Service Raw Values; Message Sending Modes

Chapter 5 ________________________________________________________________ Operation
VAISALA ______________________________________________________________________ 181
The emulated Impulsphysik transmissometer SKOPOGRAPH II
“Flamingo” message is presented below:
"S0TA" 935 2000 -87440 5300 > R0100 10 5 50 00 00 00 A0-*$
--------------------------------------------------------------------------------
¦ ¦¦ ¦ ¦ ¦ ¦¦¦¦¦¦¦¦ ¦ ¦ ¦ ¦_Checksum, 2’s cmplmt.
¦ ¦¦ ¦ ¦ ¦ ¦¦¦¦¦¦¦¦ ¦ ¦ ¦ for all char’s
¦ ¦¦ ¦ ¦ ¦ ¦¦¦¦¦¦¦¦ ¦ ¦ ¦ ¦_Status, not used
¦ ¦¦ ¦ ¦ ¦ ¦¦¦¦¦¦¦¦ ¦ ¦ ¦_Baselength, m
¦ ¦¦ ¦ ¦ ¦ ¦¦¦¦¦¦¦¦ ¦ ¦_Contrast threshold, %
¦ ¦¦ ¦ ¦ ¦ ¦¦¦¦¦¦¦¦ ¦_Update time, s
¦ ¦¦ ¦ ¦ ¦ ¦¦¦¦¦¦¦¦_Simulation Value, %
¦ ¦¦ ¦ ¦ ¦ ¦¦¦¦¦¦¦_Test generator (1-on, 0-off)
¦ ¦¦ ¦ ¦ ¦ ¦¦¦¦¦¦_Test filter (1-on, 0-off)
¦ ¦¦ ¦ ¦ ¦ ¦¦¦¦¦_Transmitter (1-on, 0-off)
¦ ¦¦ ¦ ¦ ¦ ¦¦¦¦_1st telegram after reset
¦ ¦¦ ¦ ¦ ¦ ¦¦¦_Remote/Local
¦ ¦¦ ¦ ¦ ¦ ¦¦_BGL out of range (<, >)
¦ ¦¦ ¦ ¦ ¦ ¦_MOR out of range (<, >)
¦ ¦¦ ¦ ¦ ¦_Background luminance, cd m
-2
¦ ¦¦ ¦ ¦_ln(E
t
) * 10
4
¦ ¦¦ ¦_Visibility, m
¦ ¦¦_Transmission, ‰
¦ ¦_STILBUS II indication
¦_Header
The total amount of characters in the message is 80. The transmission
times are: 2.7 s at 300 bps (10-bit char), 0.33 s at 2400 bps, 0.08 s at
9600 bps.
Message 9 - Service Raw Values
Message 9 offers a set of raw values. The contents of message 9 are
subject to change.
Message Sending Modes
Automatic Mode
In the automatic mode the LT31 system sends a predefined message at
selected intervals. The automatic and default polled message can be
defined with the SET MESSAGE TYPE command. For available
messages, see section Message Formats on page 161. The format of the
SET MES
SAGE TYPE command is presented below:
SET MESSAGE TYPE Message_number
The following command selects message 2 as the default automatic
message:
SET MESSAGE TYPE 2