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Device description
Leuze electronic GmbH + Co. KG
BCL 358
i
26
4.4.3 Raster scanner (raster line)
Multiple scan lines scan the label. Due to the optical opening angle, the reading field width is dependent
on the read distance. Provided the code is located in the reading field, it can be read during standstill. If
the code moves through the reading field, it is scanned by multiple scan lines.
The integrated code reconstruction technology permits twisting of the bar code (tilt angle) within certain
limits. These are dependent on the transport speed, the scanning rate of the scanner and the bar code
properties. In most cases, everywhere a line scanner is used, a raster scanner can be used.
Areas of application of the raster scanner:
The raster scanner is used:
• When the bars of the bar code are perpendicular to the conveying direction
(picket fence arrangement)
• With bar codes with low height displacement
• With very glossy bar codes
Figure 4.10: Deflection principle for the raster scanner
4.5
Fieldbus systems
Various product variants of the BCL 300
i
series are available for connecting to different fieldbus systems
such as PROFIBUS DP, PROFINET, Ethernet, EtherNet/IP and EtherCAT.
4.5.1 EtherNet/IP
The BCL 358
i
is designed as an EtherNet/IP device (acc. to IEEE 802.3) with a standard baud rate of 10/
100 Mbit. EtherNet/IP makes use of the Common Industrial Protocol (CIP) as an application layer for the
user. The functionality of the device is defined via parameter sets which are clustered in objects, classes
and instances. These are contained in an EDS file which, depending on the version of the control software,
can be used to configure and integrate the BCL 358
i
into the system. A fixed MAC ID is assigned to each
BCL 358
i
by the manufacturer; this address cannot be changed.
The BCL 358
i
automatically supports the transmission rates of 10 Mbit/s (10Base T) and 100 Mbit/s
(100Base TX), as well as auto-negotiation and auto-crossover.
The BCL 358
i
features optionally an MS 358 connector hood or MK 358 terminal hood for the electrical
connection of the supply voltage, the interface and the switching inputs and outputs.
Additional information on the electrical connection can be found in Chapter 7.
NOTE
With the raster scanner, there may not be two or more bar codes in the raster area of the BCL
at the same time.