4
Integration in a SAE J1939 network
4.1
Parameterizable functions
The AHS/AHM36 SAE J1939 and AHS/AHM36 SAE J1939 Inox are configured by
means of various parameters.
The most important parameters for parameterizing the functions are shown below.
CAUTION
When parameterizing the encoder, make sure that there are no persons in the hazard‐
ous area of a system!
All parameter changes directly affect the operation of the encoder. The position value
can therefore change during parameterization, e.g., if a preset is executed or the scaling
is changed. This could cause an unexpected movement that could endanger people or
damage the system or other objects.
4.1.1
Scaling parameters
Scaling
This parameter enables the resolution per revolution or the total resolution to be
scaled.
Code sequence
The code sequence determines in which direction of rotation the position value
increases when viewed in the direction of the shaft.
•
Clockwise (cw) = increasing position value when the shaft rotates clockwise
•
Counterclockwise (ccw) = increasing position value when the shaft rotates coun‐
terclockwise
The resolution of the AHS/AHM36 SAE J1939 Basic is max. 4,096 steps per revolution.
The resolution is scalable in whole number increments from 1 ... 4,096.
The resolution of the AHS/AHM36 SAE J1939 Advanced / Inox is max. 16,384 steps
per revolution. The resolution is scalable in whole number increments from 1 ...
16,384.
The total resolution, i.e., the measuring range of the AHM36 SAE J1939 Basic, is max.
16,777,216 steps. The total resolution of the AHM36 SAE J1939 Advanced / Inox is
max. 67,108,864 steps.
The total resolution must be 2ⁿ times the resolution per revolution.
Table 4: Examples for total resolution
Resolution per revolution
n
Total resolution
1,000
3
8,000
8,179
5
261,728
2,048
11
4,194,304
4.1.2
Preset function
The preset function can be used to set the position value of the encoder. I. e. the
encoder can be set to any position within the measuring range.
NOTE
The preset value must be within the configured measuring range.
4
INTEGRATION IN A SAE J1939 NETWORK
12
O P E R A T I N G I N S T R U C T I O N S | AHS/AHM36 SAE J1939
AHS/AHM36 SAE J1939 Inox
8027379/2022-01-21 | SICK
Subject to change without notice
