Example of timer intervals – Vaisala Hydromet Data Collection Platform User Manual

Page 186

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User’s Guide ______________________________________________________________________

184 __________________________________________________________________M210785EN-E

an ascending order, in such a way that the lowest range is first
and the highest last. Unused ranges can be left to their
defaults.

-

Threshold can be fixed by setting the value to Default/fixed
threshold
. Alternatively, another variable, for example, a
static parameter can be used as a threshold. In this case, the
Source and Variable fields indicate the source for the
threshold, and Default/fixed threshold gives a default value
which is used if the actual source does not return a valid value.

-

Interval defines the corresponding timer interval in seconds. If this
value is set to 0, the timer is disabled and the timed event never
occurs. See section

Example of Timer Intervals on page 184

.

-

Timer disable input is an optional parameter which defines a
variable for unconditionally disabling the timer. When the defined
variable receives a value other than zero, the disable condition
evaluates to true and the timed event never occurs.

Example of Timer Intervals

The example view (in

Figure 90 on page 185

) defines the following

intervals for the timer:

-

When the monitored value is below 1.8, the interval is set to 3600
seconds (1 hour).

-

When the monitored value is equal to or higher than 1.8 and less
than 20.0, the interval is set to 900 seconds (15 minutes).

NOTE

The last used threshold value should be set so high that the monitored
value never reaches it.

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