Vaisala Hydromet Data Collection Platform - Manual (Page 63)

Chapter 3 _____________________________________________ Configuring Modules and Sensors
VAISALA_______________________________________________________________________ 61
Configuring Vaisala Weather Transmitter
Communications Setup
Vaisala Weather Transmitter is connected to the QML logger through
an RS-485 or RS-232 serial line. There are three alternative ways to
connect the weather transmitter to the logger:
1. RS-232 autosend mode where the weather transmitter
automatically sends measurement data to the QML logger. Only
one weather transmitter per serial line is allowed.
2. RS-485 polled 2-wire connection. Several weather transmitter
sensor connections are allowed on the same serial line.
3. RS-422 4-wire autosend.
The default data transmission parameters are the following: 9600 bps, 8
data bits, no parity, 1 stop bit.
For more information on wiring of the RS-485 and RS-232 options,
refer to the installation instructions. For more information on
configuring serial ports, see Vaisala HydroMet™ Data Collection
Platform User’s Guide, Volume 2.