User Manual

Chapter 3 _____________________________________________ Configuring Modules and Sensors
VAISALA______________________________________________________________________ 117
Serial Sensor Interfaces
This chapter describes the following options in detail for each sensor:
- Default communication parameters
- Typical sensor interface configuration alternatives
- Data availability with different message types. This refers to the
availability of sensor output variables used in the setup for
calculation, logging, and reporting
- Sensor-specific issues, such as QML logger shell commands
Present Weather and Visibility Sensors
The present weather and visibility sensors are covered in the same
chapter as they produce similar data and share message structures.
The default communication parameters are as follows:
Timeout Timeout for data reception. If no new data is received
within this period of time, sensor data in reports and logs
is marked as invalid until new data is received. Timeout
starts from:
- Poll message transmit in polled mode
Message reception in automatic transmit mode
NOTE
The settings described apply only to the QML logger. You must also
configure the sensor to have the matching settings.
Parameter Value
Speed 9600 bps (PWD sensors)/300 bps (FD sensor)
Parity even
Data 7
Stop 1
Handshake none
Item Description/Use