Vaisala Hydromet Data Collection Platform - Manual (Page 184)

User’s Guide ______________________________________________________________________
182 __________________________________________________________________M210785EN-E
Events with shorter cycles, such as wind measurements and
calculations, run several times a minute, but are still synchronized to the
other slower events in their one minute frame.
This algorithm is in use unless the user modifies the synchronization
times in such a way that seconds become effected. When such a
modification is made, the timers are stored with the settings the user has
made. Automatic sequencing can be resumed with the Set Default
function.
Changing Timer Intervals
Timer intervals can be changed simply by entering a new interval in
seconds into the corresponding cell.
Threshold-Dependent Timer
Intervals
Application execution is mostly controlled by timers, which are set to
fixed intervals with Lizard Setup Software.
Threshold-controlled timer intervals provide means to change these
intervals according to limit values (thresholds) while the system is
running. For example, the following topics can be handled with this
control method:
- Power consumption control when operated on backup batteries: the
system can keep the communication equipment permanently on
when there is external AC power supplied and switch to cyclic
powered mode when the system is running on backup batteries.
- Communication cost reduction: When the measured conditions are
normal, data can be transmitted less frequently, but when preset
limits are exceeded, faster transmission cycles can be taken into
use.
Configure the interval thresholds in the Alarms view of Lizard. Figure
89 on page 183 shows a typical setup for managing the transmission
frequency of reports.