Device Description HG G-19603ZA | English, Revision 03 | Date: 31.03.2021
16
Chapter 4 – Commissioning
Meaning of the highlighted parameters:
track polarity
in
settings
menu: Polarity of the magnetic tape
sensitivity
in
settings
menu: Sensitivity of the detection of a magnetic track,
threshold value in milliTesla (mT)
sen. two tracks
in
settings
menu: Sensitivity of the detection of two magnetic
tracks. For applications without junctions set to maximum value
4
.
CAN ...
in
settings
menu: If the default settings of the CAN bus do not match
your required settings adjust them here.
sum of flux density
in
raw data menu
: Flux density of a magnetic tape under
-
neath the sensor
When using one of the magnetic tapes listed in section 3.1.1 on page 11
(HW MAT00003, HW MAT00008 and HW MAT00009) the threshold sen. two tracks
for two magnetic tracks can be set according to the following table:
If there are problems detecting the track or when the working conditions are differ
-
ent we recommend the following configuration sequence:
Configure the polarity of the magnetic tape (
track polarity
in
settings
menu).
Default for Götting magnetic tape or embedded magnetic bar: North.
Place the sensor centered above a piece of the used magnetic tape (default
reading height 60 mm). The piece should be long enough so that at least 10 cm
protrude behind and in front of the sensor.
Switch to the menu
raw data
and write the shown
sum of flux density
down.
Then switch to the
settings
menu and configure the
sensitivity
to be approx. one
fifth of the
sum of flux density
.
Switch to the main menu and move the sensor diagonally to the magnetic tape.
Check that the track is reliably detected even when it reaches the lateral edges
of the magnet sensor. Optionally the
sensitivity
in the
settings
menu has to be
reduced if the track is not detected in the border areas.
If the turnoff function is to be used the threshold
sen. two tracks
has to be
configured. Table 4 above shows typical values when Götting magnetic tape is
used. Typically the threshold for the detection of two tracks is about three times
the value for one track. If the turnoff function is not needed (because there are
no junctions in the track)
sen. two tracks
should be set to its maximum value of
4
. A good starting point for the threshold for detection of two tracks is three
times the limit for one track.
In order to test the threshold for two tracks place two pieces of magnetic tape
underneath the sensor so that the left edge of the left tape should be directly
underneath the left edge of the sensor, the right edge of the right tape should
match the right edge of the sensor. If one of the two tracks is now selected, two
magnetic tapes should be reliably detected. The track is selected via the CAN/
CANopen® interface (see chapter 7 on page 32 / 8 on page 34) or for testing via
the manual control in the main menu, see Figure 16 on page 25.
Table 4
Thresholds for two magnetic tracks with standard magnetic tapes
Reading height [mm]
50
60
70
80
90
100
sen. two tracks [mT]
0.8
0.64
0.5
0.4
0.32
0.275
