Z41 Pro / Lite / COM
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122
Figure 122
Alarm state diagram (case of confirmation previous to the alarm end)
There is also the possibility of
periodically monitoring
the status of the trigger object,
for situations where this object is periodically received from the bus. This will let Z41 Pro
/ Lite / COM
automatically assume the alarm situation if the “no alarm” value does not
get sent through the trigger object after a certain time, for example upon failures of the
transmitter. The maximum time window can be defined by parameter.
Consequently, alarm boxes permit configuring the following parameters:
Trigger
: defines the value that will trigger the alarm
(“0” or “1”; it is “1” by default),
i.e., the value that, when received through
[Pn][Bi] Alarm Trigger
, should be
interpreted by Z41 Pro / Lite / COM as an alarm situation. Implicitly, this
parameter also defines the inverse
“no alarm” value.
Periodic Monitoring
: activates
(“Yes”) or deactivates (“No”, default option)
periodic monitoring of the alarm trigger object.
Cycle Time (x 1min.)
: in case of having selected
“Yes” under the above
parameter,
sets the maximum accepted time space without receiving the “no
alarm” value before Z41 Pro / Lite / COM adopts the alarm situation.
Example I
:
supposing a certain sensor responsible for sending the value
“1” (once) to
the bus when a flood is detected, and the value
“0” (again, only once) when such situation
terminates, if the object sent is linked to the alarm trigger object from an alarm box in
Z41 Pro / Lite / COM where no periodical monitoring has been parameterised and where
the value
“1” has been set as the alarm value, then Z41 Pro / Lite / COM will notify an
emergency every time a flood takes place. The notification will stop as soon as the user
touches any button, although a warning icon will still blink on the screen. After that, if the
user acknowledges the alarm, the icon will stop blinking; switching then off once the
sensor sends a
“0”.
Trigger
Not(Trigger)
No
Alarm
Alarm
Alarm
Muted
Alarm
Confirmed
Acknowledgmt.
Random
Button Press
