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Description of operation TMS/TMM88
8.1
Axis assignment/Reversal of counting direction
All inclination sensors with current or voltage output have 2 analog outputs A and B.
These outputs can be assigned at will to the inclination axes X and Y for the 2-dimen‐
sional inclination sensor and to the axis of rotation in the case of the 1-dimensional
inclination sensor (the axes are available in the hardware). Both inputs can even be
assigned to the same axis. Since the direction can be reversed, any conceivable output
assignment is possible. This is done by swapping the output values for current or
voltage.
8.2
Zero-point setting
The zero point can be configured for all inclination sensors with current or voltage
output. This means that it is possible to specify the zero position when the sensor is
installed. The setting can be made either with the PGT-12-Pro hand-held programming
tool or using the teach input. The teach input must be connected to the supply voltage
(V+, pin 1) for at least one second if you wish to use it to set the zero point. The current
angle of the inclination sensor is then set to 0 angular degrees for both outputs. The
sensor acknowledges the setting of the zero point by switching off the status LED, also
for one second. To reset the zero point to the factory setting, the teach input must be
connected to the supply voltage for a further three seconds. The sensor acknowledges
the reset by switching off the status LED, also for three seconds.
8.3
Digital filters
TMx88 inclination sensors support an option to make the angle value more insensitive
to external vibration interference. Oscillation/vibration interference up to 0.1 Hz can be
suppressed with the configurable 8th order low-pass filter. The sensor has two digital
filters which can be selected according to the area of application in which the sensor is
being used.
Table 16: Filter selection
Filter
Configurable fre‐
quency range
Areas of application
Butterworth
0.1 Hz ... 25 Hz
Static inclination measurement with high
damping against vibrations
Critically damped
0.1 Hz ... 8 Hz
Inclination measurement for applications sub‐
ject to specific dynamics, without overshoot in
the event of changes in angle combined with
good damping
8
DESCRIPTION OF OPERATION TMS/TMM88
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O P E R A T I N G I N S T R U C T I O N S | TMS/TMM88, TMS/TMM55
8019053/1EF6/2021-12-13 | SICK
Subject to change without notice