Vaisala FS11 - Message Formats

USER'S GUIDE ____________________________________________________________________
72 ___________________________________________________________________ M211187EN-C
Checksum CSUM has to be calculated using CRC16 method (see section
CRC16 Checksum on page 170).
For example, command
!
FSA
∀
&DO STATUS
−#
036B
∃−∗
prints the status messages in frames (equal to message 3), whereas
command
!
FSA
∀
&DO MEAS_SYNC
−#
44DA
∃−∗
resets the measurement sequence. Command
!
FSA
∀
&DO NAME
−#
28D4
∃−∗
displays the device type, device name given by the user, and ID.
Command
!
FSA
∀
&DO SYSTEM
−#
6EEE
∃−∗
lists system information such as type, ID, software version, hardware
modules, and serial numbers.
Message Formats
In the command mode (entered with the command OPEN), the FS11
messages can be displayed by the MESSAGE command. In the
independent mode (entered with the command CLOSE), the FS11 sensor
can be polled or it can send predefined messages automatically at
selected intervals. There are nine message formats to select from. By
default the FS11 sensor adds frame strings to all polled and FS11 specific
automatic messages. The polling request can ask for the automatic
(default) or some other message (with a message number).
When used as a part of an RVR system, the FS11 sensor can emulate the
messages of Vaisala MITRAS Transmissometer (Single or Double
Baseline), FD12 Visibility Meter and FD12P Weather Detector. Refer to
sections FD12 Emulation on page 79 and MITRAS Emulation on page
82 to see what message types can be emulated. The FS11 sensor also
accepts MITRAS and FD12 type polling by the RVR computer when the
emulation is on.