Frequently Asked Question
How do I interprete J1939 output
Last Updated 2 years ago
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
The angle can be calculated with formula: α = J1939 output / 100. (α = angle in degrees, factory resolution is 0.01°)
Example – Inclination output of a 1-axis sensor.
The first 2 bytes are the angle value, the rest 6 bytes are not used.
Example – Inclination output of a 2-axis sensor
The first 2 bytes are X inclination, and the second 2 bytes are Y inclination. The rest 4 bytes are not used.
Acceleration can be calculated with formula: a = J1939 output / 1000. (a = acceleration in g, factory resolution is 0.001g)
For example:
The 6 bytes data are defined as below.
Please read manual for more details.
• 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
Inclination outputs PGN 65280 (FF00h).
The angle can be calculated with formula: α = J1939 output / 100. (α = angle in degrees, factory resolution is 0.01°)
Example – Inclination output of a 1-axis sensor.
The first 2 bytes are the angle value, the rest 6 bytes are not used.
Example – Inclination output of a 2-axis sensor
The first 2 bytes are X inclination, and the second 2 bytes are Y inclination. The rest 4 bytes are not used.
Acceleration can be calculated with formula: a = J1939 output / 1000. (a = acceleration in g, factory resolution is 0.001g)
For example:
The 6 bytes data are defined as below.
Please read manual for more details.