Vaisala Observation Display - Manual (Page 39)

Chapter 5 _______________________________________________________ Administrator's Guide
If Serial port is selected, Observation Display connects to the selected
serial port. Note that virtual serial ports can also be used as long as the
operating system treats them as serial interfaces.
If the weather station sends data automatically, any of the three
communications types can be used. If data is to be polled, TCP/IP client
or serial communications should be used.
Next, you can fill in the details of each communication protocol.
Timeouts
In the center of the screen, you can activate two types of timeout
procedures:
- Measurement timeouts (see General Settings - Variables) can be
enabled to indicate missing variable values. The default timeout is 60
seconds for all variables.
- If Connection timeout is enabled, the application automatically
closes and re-opens the connection if no data at all has been received
from the AWS within the specified time. This setting should be
enabled at least in all TCP/IP-type connections.
Polling
Observation Display supports polling with two separate polling
commands. These should only be used if the weather station has been
configured to respond to commands by sending a data report back to the
PC.
Select Enable to activate a polling command. Type the poll command
into the Command box. Select the interval and the synchronization time
from the numeric display controls. Interval indicates the time period
interval in seconds between successive polling commands.
Synchronization time indicates the time after midnight when the first
command is sent.
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