ADEUNIS ARF8283A Guide Utilisateur page 62

LoRaWAN DELTA P - Guide utilisateur / User guide version V1.0.0
2.1.5.02 Transmission on exceeding the threshold
The product allows the detection of threshold overruns (high and low) for the pressure delta and for the 0-10 V analog input according to the
following diagram.
FR
EN
Value < (high
threshold -)
YES
High alarm off
The product sends a data frame when the threshold is exceeded but also when the situation returns to normal.
Example :
Register Value encoding
S301 Decimal
S321 Decimal
S340 Decimal
S343 Decimal
S344 Decimal
In this example:
• The device reads the pressure delta every 10 minutes
• The product will trigger an alarm if the pressure delta is below 200 Pa
• The alarm will be deactivated if the pressure delta rises above 210 Pa
NOTE: As described in 2.1.5 it is possible to combine the periodic mode and the alarm mode.
NO
High alarm
off?
YES
Value >
High thresh-
old
YES
High alarm on
Value
0
300
1
200
10
Product in standby
Period of
No
acquisition
reached?
YES
Measurement of
pressure delta and/or
input 0-10 V
Send frame 0x54
or 0x56
Result
Event mode (no periodicity)
One reading every 10 minutes (300/60 sec x 2)
Alarm type for low threshold
Pressure delta at 200 Pa
Hysteresis at 10 Pa above the low threshold or 210 Pa
NO
Low alarm
(low thresh-
off?
YES
Value <
Low thresh-
old
YES
Low alarm on Low alarm off
Value >+
old +)
YES
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