Chapter 3 ________________________________________________________________ Installation
VAISALA ________________________________________________________________________ 61
4. After the startup FS11 outputs the following:
FS11 n.nn.n.nn where n.nn.n.nn is the software version,
revision, and build number.
5. Wait for one minute and then enter the command mode with the
command OPEN. Check with the STATUS CHECK command
that no hardware errors or warnings are detected.
6. If you are connected to the data port, enter the automatic message
mode by typing CLOSE and check that a message appears on the
display every 15 seconds.
NOTE
the unit, remember to turn off both the AC (mains)
switch and the battery switch if the battery option is installed.
Initial Settings
FS11 Visibility Sensor is typically interfaced to a host computer or a data
logger in an automatic weather observation system. After the physical
connection has been made, the details of the communication can be
configured into the FS11 software. Suitable communication settings
depend on the implementation of the entire system.
By default the sensor transmits a new ASCII data message through the
data port in RS-232 mode every 15 seconds. The user can change the
interval and message type. The sensor can also be used in a polled mode,
in which a data message is only sent when the host computer requests
one with a special command. The default communication settings are
listed in Table 8 below.
Table 8 Default Communication Settings
Polled or automatic mode, message
type
Automatic mode, message 2,
interval 15
In multipoint communication where several sensors share the same
communication line (RS-485/Modem), the FS11 sensor should be used in
the polled mode and the individual sensors should have distinct
identifiers (ID).
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