Alarm Frame; Periodic Frame With Historisation - ADEUNIS ARF8230CA Guide Utilisateur

LoRaWAN 863-870 PULSE - Guide utilisateur / User guide version V3.0.0
4.1.7

Alarm frame

This frame (0x47) is sent if the measured flow of one of the channels exceeds the configured thresh-
old for this channel (registers S326 and S327).
0
Code
0x47
0x47
Its size is of 6 bytes.
Description of the frame :
• Bytes 2 to 3: measured flow on channel A when detecting the exceeding of flow, in pulses per
hour.
• Bytes 4 to 5: measured flow on channel B when detecting the exceeding of flow, in pulses per
hour.
In the example in grey this gives:
• Bytes 2 to 3: measured flow on channel A when detecting the exceeding of flow, in pulses per hour
= 0x2904 so 10,500 pulses per hour
• Bytes 4 to 5: measured flow on channel B when detecting the exceeding of flow, in pulses per hour
= 0x206C so 8,300 pulses per hour
•
4.1.8

Periodic frame with historisation

These frames (0x5A et 0x5B) are sent, if the corresponding channels are activated (S320), at the pe-
riod defined by registers S321 x S301.
0 1
Code Status
0x5A / 0x5B Cf Status
0x5A 0xA3
WARNING : For LoRaWAN, max capacity in the frame is 23 Index samples (so S301<24 or
S301+S340<24 if redundancy is activated). If S301 or S301+S340>23, the warning bit appeared in
status byte. In this case, the product will sent the most recent samples at the expense of the oldest
ones that will be lost.
Frame description:
• Bytes 2 at 5: counter index at t0
• Bytes 6 and 7: index variation of the counter between t0 and t-1
• Bytes 8 and 9: index variation of the counter between t-1 and t-2
• ...
• Bytes 48 and 49: index variation of the counter between t-21 and t-22
In the example it gives:
• Bytes 0 = 0x5A: this frame is for channel A
• Bytes 2 at 5 = 0x00015C4F so 89 167 impulses at t0
• Bytes 6 and 7 = 0xE6F3 so 59 123 impulses of difference between t0 and t-1
• Bytes 8 and 9 = 0xF74A so 63 306 impulses of difference between t-1 and t-2
• ...
• Bytes 48 and 49 = 0xF2AD so 62 125 impulses of difference between t-21 and t-22
1
Status
Cf Status Measured flow -
0xA3
2 à 5 6 et 7
Index at t0 Variation of
the index
between
t0 and t-1
0x00015C4F 0xE6F3
2 to 3
PAYLOAD
Measured flow -
channel A
0x2904
8 et 9
PAYLOAD...
Variation of
the index
between
t-1 and t-2
0xF74A
4 to 5
channel B
0x206C
... 48 et 49
... Variation of
the index
between
t-21 and
t-22
... 0xF2AD
Page 87 of 103
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