Troubleshooting - Balluff BML-S1A-Q/A-M-0-S184/KA Serie Manual De Instrucciones

BML-S1A_-Q/A_ _ _-M_ _ _-_0-S184/KA_ _
Linear Position Encoder
9

Troubleshooting

Problem
The controller is receiving (at times)
no distance information. On a digital
BML the LED flashes.
The controller is receiving no
distance information at certain
points.
Limit switches not switching
correctly.
Reference point signal not being
output.
Linearity deviation is out of
tolerance.
16
english
Possible causes
The necessary supply voltage is not
present.
The voltage drop is too great (see
formula page 11).
Cables are not connected.
The orientation of the tape with
reference point is not correct.
The distance between sensor head
and tape is (in places) wrong.
The magnetic poles of the tape are
damaged in places by the presence
of strong magnets.
The distance between the limit
switch magnets and sensor head is
incorrect.
The limit switch magnets are
mounted with the wrong side facing
the sensor head (wrong polarity).
The controller has no pull-up
resistor.
The orientation of the tape with
reference point is not correct.
The sensor head is not moving
parallel to the tape (see Fig. 4-4 for
tolerance).
Distance between sensor head and
tape is too great.
Remedy/Explanation
When turning on the BML system
the LED (digital BML only) must
come on briefly. Otherwise check
whether power is present and
whether the BML is properly
connected.
The system must have an operating
voltage of ...5 ±5V. Check the
voltage on the Sense line or using
the formula (p. 11).
Check cables against the wiring
diagrams.
The reference point mark must be
on the right side of the sensor head
(Fig. 4-5). Replace tape.
Adjust the height of the sensor
head. To check this, move the head
by hand over the entire measuring
range; the LED (digital BML only)
should never come on.
The LED will flash in the damaged
areas (digital BML only). Replace
tape.
Check gap and angle with respect
to tape (Fig. 4-13, 4-15) and correct.
Check and correct the limit switch
magnets with respect to the travel
direction (Fig. 4-14).
Install pull-up resistor in controller
(Fig. 5-6).
The reference point mark must be
on the right side of the sensor head
(Fig. 4-5). Replace tape.
Correctly position the sensor head
(section 4).