Chapter 4 _________________________________________________________________ Operation
VAISALA ________________________________________________________________________ 79
Message Formats
In the command mode (entered with the command OPEN), the FS11P
messages can be displayed by the MESSAGE command. In the
independent mode (entered with the command CLOSE), the FS11P
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 FS11P sensor adds frame strings to all polled and FS11P
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 FS11P 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 89 and MITRAS Emulation on page
91 to see what message types can be emulated. The FS11P sensor also
accepts MITRAS and FD12 type polling by the RVR computer when the
emulation is on.
MESSAGE Command
The MESSAGE command is used for displaying messages. The
command format for the MESSAGE command is
MESSAGE Message_number
If the message number is not specified, FS11P displays a default
message. The default message is the message that has been selected for
automatic or polled mode with the command SET MESSAGE TYPE.
NOTE
When displaying a message with the
MESSAGE command, the
message frames are not displayed.
All message frames end with
which represent the carriage return and
line feed characters. This character is also used as a line separator in
multi-line messages.
The contents of the messages are described in the following sections.
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