Appendix; Troubleshooting - Balluff IO-Link BML SL1-ALZ0-U1ZZ Serie Notice D'utilisation

BML SL1-ALZ0-U1ZZ-_ U1L-_ _
Absolute Magnetically Coded Position Measuring System
10

Appendix

10.1

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 at
certain positions 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 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
(inconsistency).
The direction of the 1Vpp signal and
absolute value do not match.
22 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 IO-Link communication
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 (tolerance
Fig. 4-1).
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 function is disrupted by
incorrect installation or damage to the
magnetic tape.
The orientation of the magnetic tape is
incorrect or the magnetic tape is
damaged.
Check the controller configuration;
change if necessary.
Troubleshooting/explanation
Check if there is any voltage and that the
BML is correctly connected.
The position measuring system must
receive a supply voltage of 18...30 V.
Check the pin assignment using the wiring
diagrams.
A flashing LED indicates an active IO-Link
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 travel range and perform the start set
function there.
Use a shorter supply line.
Check for the correct installation of the
sensor and the magnetic tape. Check if
the direction of the arrow on the magnetic
tape and sensor head matches.
Check for the correct installation of the
sensor 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, e.g. by swapping +A and –A or
+B and –B.