ifm electronic JN2100 v.2.0 - Manual (Page 19)

UK
Inclination sensor JN
19
7.8.1 Set zero point (2046h)
To set the zero point the sensor is rotated in the requested position�
► Write the value 1 (activate set zero point) to the object 2046h (zero point x and
y axis)�
> The sensor calculates the offset to the zero point shift and saves it in the
EEPROM� From now on the offset is added to the angle�
7.8.2 Terminating resistor (2045h)
In bus topology the CANopen system is terminated with terminating resistors
(120 Ω) at the beginning and end. The terminating resistor integrated into the
sensor can be activated by writing the value 1 to the object 2045h�
7.8.3 Set teach (2042h)
In principle, all provided inclination values refer to the sensor's coordinate system
x
s
,y
s
,z
s
which is described in chapter 7�6�
Should it not be possible to integrate the inclination sensor into the measured
object so that the coordinate system of the sensor and object match, the teach
function enables the creation of a new reference system� The new reference
system x
b,
y
b,
z
b
is defined so that its z
b
direction corresponds to the direction of
gravitation at the teach moment� The x
b
direction of the reference system results
from the projection of the x
s
axis of the sensor to the x
b
y
b
plane of the reference
system� The y
b
axis then corresponds to the direction which is perpendicular to
both the z
b
and the x
b
axis�
The result of this is that at the teach moment the xs axis must not be parallel to the direction of
gravitation� As long as the value for the SDO index 2042h is 1, all angle indications are converted into
the new reference system�