Application Planning; General Operating Conditions; Antenna Configurations; Data Carrier Selection - Balluff BIS U-6127-081-1 4-06-ST36 Betriebsanleitung

BIS U-6127-081-1_4-06-ST36
Processor unit
6

Application planning

6.1

General operating conditions

The BIS U-6127 can be used in many locations. The IP65
housing and the ambient temperature range of −20...
+55 °C make it robust against environmental influences.
For details on mounting and planning the installation
location, see chapter 4 on page 15.
6.2

Antenna configurations

Up to four antennas can be connected to the BIS U-6127
device (for mounting of antennas see chapter 4.4 on
page 17).
The four antennas can be divided as desired into individual
detection ranges and serve these individually, or they can
be operated in combination. For example, antenna 1 can
monitor a position on a conveyor belt before processing,
antenna 2 another position after processing, and
antennas 3 and 4 together monitor a gateway.
When aligning the antennas, the application environment
must be considered first and foremost. The detection
range in which data carriers are located must be precisely
defined at the beginning. Then the antennas must be
mounted in such a way that the best possible illumination
of the detection range with the antenna beams is ensured.
If the desired detection range is small and
precisely defined (e.g. an area of
30 x 30 x 30 cm), one antenna may be suffici-
ent.
If a gate application with varying data carrier
positions is to be covered, several antennas are
required.
If possible, avoid metallic structures in the detection range
or in the immediate vicinity. Metal surfaces shadow the
region behind them. Flat metal surfaces can change the
beam direction of the radio waves by reflection and lead to
cancellation or over-coverage due to superimposition.
The antenna beams may or should overlap in order to
avoid holes in the detection range. If several antennas are
used, it does not matter whether they are arranged next to
each other, at an angle or opposite each other. The only
focus of the antennas must be on the detection range.
The transmitting power can be used to control the range of
the antenna. The ranges also depend on the type of data
carrier used. The maximum read ranges are usually
significantly greater than the maximum ranges for writing to
data carriers. In part, this can be compensated for by
specifying a write add-on (targeted increase in power) in
the parameter settings.
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Another aspect of the antenna configuration is the
movement speed of the data carriers. If only the EPC of a
data carrier has to be detected and no further data has to
be read and written on the tag, then the detection range in
the direction of movement can be selected to be smaller,
since the process is possible in a shorter time.
If data carriers move relatively quickly through the antenna
field and further data must be read or written on the tag,
the antennas must be arranged in such a way that the
data carriers stay in the antenna field as long as possible,
for example, to write the data completely to the data
carriers.
The antenna settings can be parameterized in different
ways:
– in the UHF Manager
– on the web server of the device
– via the 007 command set
– via the OPC UA commands
For more information, see chapter 7.3 on page 49.
6.3

Data carrier selection

Correctly selected data carriers contribute a great deal to
the success of the application. When selecting data
carriers, the following factors must be taken into account:
1. Memory size
If only the EPC has to be read for this application, data
carriers with a small memory size (user memory) are
sufficient. However, if several process data items need
to be written to a data carrier, the minimum memory
size of a data carrier must be defined.
2. Ambient conditions
The environment of the data carrier plays a decisive
role for the function of the entire application. If neither
moisture nor mechanical stress is relevant, inexpensive
label data carriers can be used. If the data carrier
comes into contact with moisture, a data carrier with
protection class IP67 (or higher) must be used.
The main distinction between data carriers, however, is
the medium on which the data carrier is mounted. If
data carriers have to be mounted on metal, the use of
on-metal tags must be checked (see chapter 4.5 on
page 17).
On-metal tags generally have poorer UHF
performance (especially in read/write range)
than comparable standard tags.
Every UHF application must be configured in such a
way that the data carriers are detected reliably. This
applies in particular to the arrangement of the antennas
and the position of the data carriers on the goods to be
detected.
3. Read/write range
A decisive factor in UHF application planning is the
read/write distance, i.e. the distance between the data
carrier and the antenna.
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