Balluff BML SL1-ALZ1- Série Notice D'utilisation page 56

BML SL1-ALZ1- _ _ ZZ -ABA _ - S284/KA _ _
Absolute magnetic encoder system
11
Appendix
11.1 Troubleshooting
Error
The controller does not receive any
travel information.
The controller does not receive any
travel information at certain points
or an
incorrect position is output when
switched on.
Non-linearity is outside the
tolerance.
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.
Mean value of the analog 1-Vpp
voltages is too low (< 2.4 V).
LED lights up/flashes red.
During switch-on, the BML
transmits a position signal. After a
short movement, an error occurs
(in the plausibility check).
The direction of the 1Vpp signal
and absolute value do not match.
SSI: Resolution deviates from the
data sheet specifications by a
multiple.
Controller reports transducer error. There may be a wiring error.
26 english
Possible causes
The required supply voltage is not
available.
The voltage drop in the supply line is
too large.
The sensor head is not properly
connected.
There is no SSI/BiSS communication. A flashing LED indicates active data
The distance between the sensor
head and magnetic tape is incorrect
(in some places).
Some of the magnetic poles of the
magnetic tape are damaged
(mechanically damaged or due to
strong magnets).
The sensor head is not moving
parallel to the magnetic tape (for
tolerances see Section 4.3.3 and
Section 4.3.4).
The distance/angle between the
sensor head and magnetic tape is too
large.
The measuring range was not set
correctly.
Voltage drop in the supply due to
excessive line resistance.
The sensor head function is disrupted
by incorrect installation or damage to
the magnetic tape.
The orientation of the magnetic tape
is incorrect, the working space is not
being maintained, or the magnetic
tape is damaged.
Check the controller configuration;
change if necessary.
+Clk/–Clk or +Data/–Data reversed or
wrong controller settings.
+Clk/–Clk, +Data/–Data, +sin/–sin or
+cos/–cos are reversed or wrong
controller setting.
Troubleshooting/explanation
Check if there is any voltage and that the BML
is correctly connected.
The magnetic encoder system must receive a
supply voltage of 5V or 10...30 V.
Check the pin assignment using the wiring
diagrams.
transmission. If this LED is not flashing, check
the connection.
Adjust the height/angle of the sensor head. To
check, move the sensor head by hand over the
entire measuring range.
Exchange the magnetic tape.
Correctly position/orient the sensor head (see
Section 4).
Move the sensor head to the beginning of the
area of travel and perform the start set function
there.
Use a shorter cable or in case of a 5 V supply
voltage ensure that the voltage drop on the
cable is compensated.
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.
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.
If necessary, change the controller
configuration or real-time signal count direction
by switching +A and –A or +B and –B.
Check wiring or settings.
Check wiring or settings.