Balluff BML-S1G0-.7..-M5E.-.0 Serie Betriebsanleitung Seite 66

BML-S1G0-_7_ _-M5E_-_0-_ _
Absolute Magnetically Coded Position Measuring System
12
Appendix
12.1 Troubleshooting
When hazardous events occur in safety
applications always contact the service
department of the manufacturer!
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.
VH takes too long.
A position substantially larger than null is
output near the start of the magnetic
tape.
Position extremely high (negative value)
Mean value of the analog voltages is too
low (< 2.4 V).
LED does not light up solid green.
Error bit = low (BiSS) or high (SSI),
warning bit = low (BiSS)
Resolution only half of specification on
type code breakdown, e.g. 2 µm instead
of 1 µm.
During switch-on, the BML transmits a
position signal - after a short movement,
an error occurs (inconsistency).
The direction of the real-time signal and
absolute value do not match.
32 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.
The orientation of the magnetic tape is
incorrect.
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.
Sensor outputs a negative position.
The Preset function has not been executed
yet.
Sensor outputs a negative position.
Preset function has not yet been performed.
Voltage drop in the supply
See LED error code (section 8), and for BiSS
see additionally the register datum for error
byte 0x48.
+Clk/–Clk or +Data/–Data reversed
The orientation of the magnetic tape is
incorrect. See the magnetic table labeling in
Fig. 3-2.
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 have an
operating voltage of 5 V ±5%.
Check the pin assignment using the wiring
diagrams.
Check the orientation of the tape to the sensor
head and correct if necessary.
Adjust the height and 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 Preset function
there.
Move the sensor head to the beginning of the
area of travel and perform the Preset function
there.
Move the sensor head to the beginning of the
area of travel and perform the Preset function
there.
Increase the supply voltage 5 V to compensate
for the voltage drop.
Error 1 (red): Switch sensor head off/on,
exchange sensor head.
Error 3 (red): Reduce SSI clock rate.
Error 4 (red): Increase supply voltage
slightly.
Error 1 (orange): Travel by approx. 30 mm in
direction X.
Error 2 (orange): Reduce gap, exchange
magnetic tape.
Error 3 (orange): Exchange magnetic tape.
Error 4 (orange): Switch sensor head off/on,
exchange sensor head.
Check wiring.
Remove the magnetic tape and replace it with a
new magnetic tape with the correct orientation.
If necessary, change the controller configuration
or real-time signal count direction by switching
+A and –A or +B and –B.