Vaisala Hydromet Data Collection Platform - Manual (Page 67)

Chapter 4 ____________________________________________ Basic Use of Lizard Setup Software
VAISALA_______________________________________________________________________ 65
To configure the settings of a communication port:
1. Select the Service connection enabled option to enable service
connection. This allows you to access service functions, such as
software upload, log file download, and time setting.
It is recommended that you keep the service connection enabled at
least for the COM0 port (default).
2. Set the basic communication parameters, data transfer speed, data
stop, bit stop, and parity in the Line parameters frame by selecting
the correct options from the corresponding combo boxes.
It is recommended that you keep the parameters for the COM0 port
in their default values: 9600, 8, 1, none.
3. Choose the correct handshake options by selecting the desired
check boxes under Handshake options. The flow control options
using the XON/XOFF characters are individually selectable for
reception and transmission. You can also define the Receive
buffer limit (%): the receive flow control is activated/cleared
when the amount of free space in the receive buffer passes this limit
(percentage of total buffer size).
4. Select the correct transmit control parameters in the Transmit
control frame. These parameters allow you to control external
hardware, such as the radio modem. You can enable transmit
control using the RTS signal, as well as choose the RTS output
polarity (normal or reverse).
In addition, you can switch on the transmitter of the radio before
actual transmission using the RTS signal with a configurable delay.
When the transmission has finished, the transmitter can be
switched off with another delay setting. Alternatively, this
parameter can be used to keep the radio transmitter enabled after
the last character has been transmitted.
5. Set the correct transmit and receive buffers in the Buffers frame.
This sets the internal buffer sizes in the QML logger. Normally,
these values should be left to their defaults. In case you have
changed the parameters but want to return to the default settings,
click the Set Default button.
NOTE The information pane with general help information is available on all
the configurable items in case you need more information.