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User Manual - QG65N2 SAE J1939 Inclinometer (Type JB) V1.1
6.5.
Output format
The device supports 2 different parameter groups (Tx PGNs):
•
Proprietary B Tx PGN1 65280 for Longitudinal, Lateral Inclination (Availability of lateral information depends on sensor
type)
•
Proprietary B Tx PGN2 65283 for X, Y, Z Acceleration
6.5.1.
Inclination outputs PGN 65280 (FF00h).
PGN
Name
Priority
SPN
position(bit)
SPN
Width(bit)
Resolution
Offset
Data Range
65280
d
FF00
h
X axis
(Longitudinal)
3
0
16
0.01°/bit
−
-90° - +90°
Y axis
(Lateral)
3
16
16
0.01°/bit
−
-90° - +90°
Table 4 – Transmit PGN1 inclination 2-axis
PGN
Name
Priority
SPN
position(bit)
SPN
Width(bit)
Resolution
Offset
Data Range
65280
d
FF00
h
X axis
(Longitudinal)
3
0
16
0.01°/bit
−
-180° - +180°
Table 5 - Transmit PGN1 inclination 1-axis
The angle can be calculated with formula:
α
= J1939 output /
100. (α = angle in
degrees, factory resolution is 0.01°)
Figure 14 - Output 1-axis ±180° sensor
Figure 15 - Output 2-axis ±90° sensor
Figure 16 - Output 2-axis ±30° sensor
Example – Inclination output of a 1-axis sensor.
The first 2 bytes are the angle value, the rest 6 bytes are not used.
Byte0
Byte1
0A
h
0A
h
Inclination output: 0A0A
h
= 2570
d
= 25.70°
Table 6 - Output 1-axis ±180° sensor explanation
