NOVUS AUTOMATION
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12.
ALARMS
The
LogBox Wi-Fi
allows you to define 10 alarms that can have different functionalities. Alarms will be shown on the display and can be set to
activate an internal buzzer, to send e-mails to up to 10 users previously registered whenever an alarm situation is satisfied or if the Start and End of
Logs Mode are set to "By Alarm" to start or stop the logs.
The general configuration parameters can be defined in the
NXperience
software (see section
in the
chapter) and are described below:
●
Buzzer Runtime:
Allows you to set a buzzer runtime for each time the device enters an alarm situation. The configuration will be performed in
seconds, from 0 to 65000 s, where 0 means that the buzzer should not be triggered. The longer the buzzer runtime, the greater the battery
consumption during the alarm situation.
●
Digital Output Mode:
Allows you to configure the digital output to follow an alarm situation. This way, whenever the alarm situation is satisfied,
the Digital Output will be activated. The digital output will be disabled if no channel is an alarm situation.
When an alarm condition is satisfied, the
symbol will light up along with the ,
,
,
symbols, which correspond to the channels
that satisfy the current state alarm situation. The ,
, ,
symbols indicate that the channel is currently in an alarm situation. The
symbol indicates that since the device was powered on or since the last alarm status was cleared, an alarm occurred. The retentive alarm statuses
of each channel can be cleared through the display screens or through
NXperience
.
If two channels are compared to each other, the symbol for the main channel will light up.
For each enabled alarm, depending on the situation, specific values must be set for the following parameters:
•
Setpoint:
Allows you to set the value to be exceeded for the channel to satisfy the alarm situation.
•
Hysteresis:
Allows you to set the barrier to be exceeded for the channel to exit the alarm situation.
•
Range:
Allows you to set the range that will satisfy the alarm situation.
You can set a specific alarm to compare any channel with a preset setpoint, as well as a comparison between two channels. In any of these
situations, you must define the operation to be performed:
•
Less than (<):
The alarm will be activated whenever the value of the main channel is less than the value of the secondary channel or when the
value of the main channel is less than the configured setpoint.
•
Greater than (>):
The alarm will be activated whenever the value of the main channel is greater than the value of the secondary channel or
when the value of the main channel is higher than the configured setpoint.
•
Within Range (=):
When performing a comparison between a channel and a setpoint, the alarm will activate when the value is within the
predefined range, considering the setpoint value configured ± the range. When performing a comparison between two channels, the alarm will
be activated when the values of the two channels are within the value of the configured range.
•
Out of Range (≠):
When comparing a channel with a setpoint, the alarm will be activated when the value is outside the predefined range,
considering the setpoint value configured ± the range. When performing a comparison between two channels, the alarm will be activated when
the values of the two channels are outside the value of the configured range.
In comparisons using the
Within Range (=)
or
Out of Range (≠)
operations, the hysteresis will automatically be calculated as 10% of the
configured range value. Thus, a configured alarm that is activated will only leave the alarm situation when, in addition to satisfying the configured
range value, the 10% hysteresis is also satisfied.
The status information of the configured alarms will be updated by any events that trigger an acquisition, which may be readings within the log
range or in the display update range. If the main channel is one of the channels being logged, an extra log will be made in the memory as soon as it
enters an alarm situation. The same process will occur when you leave the alarm situation.
If an alarm reaches a minimum or a maximum value, it may not be registered in memory. Thus, it is possible that the alarms report that the channel
has already reached one of these situations and the information is not available in a download.
In case of an error value in the analog inputs, the alarm will remain as it was.
