ACTinBOX QUATRO
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Cyclical monitoring period (minutes): defines, for the case of having a
periodically-sent alarm object (“1” or “0”, as corresponding each time), the
maximum permitted time without receiving the “no alarm” value (“[OX]
Alarm” = value contrary to the parameterized trigger value) before the
actuator automatically assumes the alarm status, foreseeing the possibility
of a failure in the transmitting device. If for whatever reason the monitoring
period expires, ACTinBOX QUATRO will trigger the parameterized action
(unless it does not imply a change in the output status). This will not
happen while the “no alarm” value keeps being sent before each
monitoring period expires. The cyclical monitoring can be disabled by
simply setting a 0 under this filed.
The following example is provided for a better comprehension:
Example:
Suppose that a cyclical monitoring period of 2 minutes is configured. The trigger value
is “1” and the reaction of the actuator when the alarm is activated consists in switching
on the output, while when the alarm is deactivated, the output will be switched off.
Assuming that the output is off, the alarm becomes active (“[OX] Alarm=1”), so the
output is switched on. While the alarm is not deactivated, any action over the output will
be ignored. After some time (t2), the alarm is deactivated (“[OX] Alarm=0”), which
makes the output switch from ON to OFF. Before the parameterized cyclical monitoring
period (2 minutes) ends, a new alarm deactivation order arrives, so the time count
starts again. After 2 minutes without receiving further values through the alarm object,
the alarm will be automatically activated, making the output status switch on. As before,
any action over the output will be ignored until the alarm is deactivated. See the
following figure.
Activation