LSI LASTEM M-Log – User’s manual
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Threshold value compare algorithm can be applied to one or more measures; in the last case all used
measures must be consecutively ordered (the list cannot include any measures that shouldn’t be
considered in the comparing), because the logic programming needs the ordinal numbers of the first
and last measure. This logic can be programmed to detect the alarm condition only if all measures
(that belongs to the selected set) or alternatively only one of them are contemporary over the stated
limit.
Furthermore it’s possible specify a minimum time (during that the measure stays over the set
threshold value) to enter into the alarm condition and a minimum time to exit from the alarm
condition. It can be done applying the algorithm to only one measure (i.e. it isn’t possible to
program the minimum times if two or more measures have been selected).
5.5.6
Timer
The timer logic allows: to activate or deactivate the actuator in two different times in the day, or
alternatively to define a timed cycle on/off status. Can be set:
Timer type (cyclic or time);
The power-on delay after the initial instant determined by the cycle;
If timer type is cyclic, the on and off statuses duration; the first cycle starts in the day time
when the instrument clock time, divided by the sum of the two durations, returns zero as
remainder; in this way the first cycle starts in a precise day time, not at any moment (i.e. if
has been programmed 15 minutes
On
period duration, and 45 minutes
Off
period duration,
the first cycle starts at the first hour and zero minutes after the instrument survey is started);
the next cycles happen at set on/off times.
If timer type is not cyclic, the day time of power on the actuator, and the day time of power
off.
