
26
11.1 Troubleshooting
Error
Possible causes
Troubleshooting/explanation
The controller does not receive any
travel information.
The required supply voltage is not
available.
Check if there is any voltage and that the BML
is correctly connected.
The voltage drop in the supply line is
too large.
The magnetic encoder system must receive a
supply voltage of 5V or 10…30 V.
The sensor head is not properly
connected.
Check the pin assignment using the wiring
diagrams.
There is no SSI/BiSS communication. A flashing LED indicates active data
transmission. If this LED is not flashing, check
the connection.
The controller does not receive any
travel information at certain points
or an
incorrect position is output when
switched on.
The distance between the sensor
head and magnetic tape is incorrect
(in some places).
Adjust the height/angle of the sensor head. To
check, move the sensor head by hand over the
entire measuring range.
Some of the magnetic poles of the
magnetic tape are damaged
(mechanically damaged or due to
strong magnets).
Exchange the magnetic tape.
Non-linearity is outside the
tolerance.
The sensor head is not moving
parallel to the magnetic tape (for
tolerances see Section 4.3.3 and
The distance/angle between the
sensor head and magnetic tape is too
large.
Correctly position/orient the sensor head (see
Section 4).
A position substantially larger than
null is output near the start of the
magnetic tape
or,
during movement, the position
value jumps from 8 m to 0 m.
The measuring range was not set
correctly.
Move the sensor head to the beginning of the
area of travel and perform the start set function
there.
Mean value of the analog 1-Vpp
voltages is too low (< 2.4 V).
Voltage drop in the supply due to
excessive line resistance.
Use a shorter cable or in case of a 5 V supply
voltage ensure that the voltage drop on the
cable is compensated.
LED lights up/flashes red.
The sensor head function is disrupted
by incorrect installation or damage to
the magnetic tape.
Check for the correct installation of the sensor
head and the magnetic tape. Check if the
direction of the arrow on the magnetic tape and
sensor head matches. Check whether the
sensor head is being operated within the limits
defined in Section 4. Check magnetic tape for
mechanical or magnetic defects.
During switch-on, the BML
transmits a position signal. After a
short movement, an error occurs
(in the plausibility check).
The orientation of the magnetic tape
is incorrect, the working space is not
being maintained, or the magnetic
tape is damaged.
Check for the correct installation of the sensor
head and the magnetic tape. Check if the
direction of the arrow on the magnetic tape and
sensor head matches.
The direction of the 1Vpp signal
and absolute value do not match.
Check the controller configuration;
change if necessary.
If necessary, change the controller
configuration or real-time signal count direction
by swiA and –A or +B and –B.
SSI: Resolution deviates from the
data sheet specifications by a
multiple.
+Clk/–Clk or +Data/–Data reversed or
wrong controller settings.
Check wiring or settings.
Controller reports transducer error. There may be a wiring error.
+Clk/–Clk, +Data/–Data, +sin/–sin or
+cos/–cos are reversed or wrong
controller setting.
Check wiring or settings.
11
Appendix
BML SL1-ALZ1- _ _ ZZ -ABA _ - S284/KA _ _
Absolute magnetic encoder system
english
Содержание BML SL1-ALZ1 ZZ-ABA S284/KA Series
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