WATTECO BoB Assistant, Reference Manual

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Bob Assistant - Reference Manual
2023-04-04 - Version 1.0 34
3.3.2. Report message payload data extraction example
Report payload:0x72087f5a00353e090019260c552a00007c77ffffffffffffffff
byte 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 - - - - - - - 26
72 08 7f 5a 00 35 3e 09 00 19 26 0c 55 2a 00 00 00 7c 77 ff ff ff ff ff ff ff ff
Byte Definition hex dec Value Unit Comments
0
Header
72 114 114 =ASCII “ r ”
=>Report frame
- Report header
1
Anomaly level (in %)
08 8 8*100/127=6.3 % Calculated over « machine on » time
2
Operating time
7f 127 127*180/127=180 min Report length=180 minutes
Operating rate in percentage:
[decimal Value]*100/127
3
[0%-10%] anomaly
level time
5a 90 90*180/127=128 min To get the value in percentage:
[value in min]/[Report period]*100
4
Alarm Number
00 0 0 - No alarms during this report period
5
Temperature
35 53 53-30=23 °C Hardware offset
6
Report period (R_V)
3e 62 62>59
=> Report period = (value – 59) * 60=(62-
59)*60=3*60 =180
min If value < 59
→
= value
If value > 59
→
= (value – 59) * 60
7
Report ID
09 9 9 - 9 th report (next report ID will reset to 0)
8 Maximum vibration
amplitude (3 bytes)
Vibration level 1
(vl_1)
Vibration level 2
(vl_2)
Vibration level 3
(vl_3) 00 0 vl=(vl_1*128+vl_2+vl_3/100)/10/121.45
=> vl=(0*128+25+38/100)/10/121.45
vl=0.0209
g vl=0.0209g
9 19 25
10 26 38
11 Peak frequency index
(frequency with the
highest vibration
level recorded) 0c 12 Freq_index=Value+1=13
Freq_value=(Value+1)*FREQ_SAMPLING
_ACC_LF/256=13*800/256=40,625
-
Hz
Freq_index=13
Freq_value=40,625Hz
(reminder: FREQ_SAMPLING_ACC_LF=800)
12 [10%-20%] anomaly
level time 55 85 (180 – 128)*85/127=35 min Raw data of time in anomaly in the payload are
given on the « bad vibration » period : operating
time
– [0-10%] time
To have the value in percentage:
[value in minutes]/[Report period]*100
13 [20%-40%] anomaly
level time 2a 42 (180 – 128)*42/127=17 min Raw data of time in anomaly in the payload are
given on the « bad vibration » period : operating
time
– [20-40%] time
To have the value in percentage:
[value in minutes]/[Report period]*100
14 [40%-60%] anomaly
level time 00 0 (180 – 128)*0/127=0 min Raw data of time in anomaly in the payload are
given on the « bad vibration » period : operating
time
– [40-60%] time
To have the value in percentage:
[value in minutes]/[Report period]*100
15 [60%-80%] anomaly
level time 00 0 (180 – 128)*0/127=0 min Raw data of time in anomaly in the payload are
given on the « bad vibration » period : operating
time
– [60-80%] time
To have the value in percentage:
[value in minutes]/[Report period]*100
16 [80%-100%] anomaly
level time 00 0 (180 – 128)*0/127=0 min Raw data of time in anomaly in the payload are
given on the « bad vibration » period : operating
time
– [80-100%] time
To have the value in percentage:
[value in minutes]/[Report period]*100
17 Battery percentage 7c 124 124 x 100 / 127 = 97,6 % Estimated, based on current consumption and
time spent in each mode (data acquisition, IA
processing, Lora transmission, sleep mode)
18-26 Anomaly forecasts
24h:20%-50%-80%
30d:20%-50%-80%
6m:20%-50%-80% 77 ff ff
ff ff ff
ff ff ff
119 255 255
255 255 255
255 255255
119/ / /
/ / /
/ / /
hours
days
months
Forecasts are calculated with a linear regression,
using data of the previous 24h, respectively 30
days, and 6 months.
If value = 255, it means infinite time, we suggest
not to display any value