Startup; Starting Up The System; Check System Function; Operating Notes - Balluff BML-S1G0-B7-M5E-0-S284 Serie Betriebsanleitung

BML-S1G0-B/S7_ _-M5E_-_0-(SA26-)S284
Absolute Magnetically Coded Position Measuring System
5

Startup

5.1

Starting up the system

DANGER
Uncontrolled system movement
When starting up, if the position measuring system is part
of a closed loop system whose parameters have not yet
been set, the system may perform uncontrolled
movements. This could result in personal injury and
equipment damage.
► Persons must keep away from the system's
hazardous zones.
► Startup must be performed only by trained technical
personnel.
► Observe the safety instructions of the equipment or
system manufacturer.
1. Check connections for tightness and correct polarity.
Replace damaged connections or devices.
2. Turn on the system.
3. Check measured values in the controller and reset if
necessary.
SSI/BiSS C interface
Only send clock impulses if there is power in the
position measuring system.
5.2

Check system function

Check all functions as follows after assembling the position
measuring system or exchanging the sensor head:
1. Switch on the sensor supply voltage.
2. Evaluate the position data.
3. Move the sensor head along the entire measuring
range. Heed the error and warning bits in the data set
as well as the LED errors and warning sequences.
4. Check that the count direction of all interfaces
(SSI/BiSS 1 Vss or A/B) corresponds with the direction
of travel.
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5.3

Operating notes

– Check and record the function of the position
measuring system and all associated components on a
regular basis.
– If there are malfunctions in the position measuring
system, take it out of service and secure it against
unauthorized operation (see also Troubleshooting on
page 35).
– Secure the system against unauthorized use.
The BML is an absolute measuring system.
When the supply voltage is switched on, the
absolute position is immediately available
without the need for a reference run. The sensor
head may not be removed in direction Z or Y
from and replaced on the magnetic tape during
operation. An error message is output
immediately if lifted. If the sensor head is
returned, a valid signal is not output until a
movement of approx. 30 mm in direction X has
occurred or after 2 seconds. Leaving and
approaching the magnetic tape in the direction
of travel with a speed of 1 mm/s to 10 m/s is,
however, permissible, where the maximum
speed depends on the resolution or edge
distance (see Tab. 9-1 on page 29 and
Tab. 6-3 on page 22). After the active surface
is located above the measuring tape, the error
signal disappears after 2 ms and a valid position
value is output.
5.4

Start set

The magnetic tape has an absolute coding over 48 m.
Thus, with shorter travel distances the position of the
sensor head can be permanently set to a start value of
10 mm at any location (start set), which is particularly
recommended for SSI interfaces with a low number of bits.
To do so, a voltage between 10 V and 28 V is applied to
the line of pin 11, GY PK for > 1 s. The current position is
then 10±1 mm. If the sensor head is moved backwards
more than 10 mm, the position decreases to zero and then
becomes negative (two's complement). If these values are
not useful to the controller, the start set function has to be
used at the beginning of the range of movement. The
transmitted position can never be negative then. If the
magnetic tape is exchanged, the start set function must be
repeated at the start position.
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