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Device description
4.6
Networking - Leuze multiNet plus
In the Leuze multiNet plus network, up to 32 barcode readers can be networked together.
The respective network devices transmit the read data when requested to by the BCL 500
(or MA 31) network master. For this purpose, each BCL 500
station address which is set with the aid of the display on the respective BCL 500
BCL 501
i
.
The master then transmits the data of all network devices via its host interface to a primary
PLC control system or a computer, i.e. it "collects" the scanner data in the network and trans-
mits it to an interface on the host computer. This reduces interface costs (CPs) and time
spent programming the software.
BCL 500
Figure 4.8:
Two-wire RS 485
The Leuze multiNet plus is optimised for fast transmission of scanner data to a primary
host computer. The multiNet plus consists physically of a two-wire RS 485 interface through
which the Leuze multiNet plus software protocol is controlled. This makes wiring the
network easy and inexpensive as slaves are connected to one another in parallel.
In principle, networking occurs via a parallel connection of the individual RS 485 interfaces
of the respective barcode scanners. Shielded, twisted pair conductors should be used for
the Leuze multiNet plus. This allows a total network length of up to 1200m.
4.7
Leuze multiScan
The multiScan operating mode is based on Leuze multiNet plus and links individual
barcode readings from multiple barcode scanners into a single decoding result. This is used,
for example, on a packet conveyor system on which the label can be affixed on either the
right or left side, thereby requiring two read stations. To prevent the host from having to
26
i
master
i
BCL 501
slave 1
Terminating resistor on the last slave
Networking possibilities using the multiNet plus
BCL 500
to PC/PLC
i
BCL 501
slave 2
i
i
\ BCL 501
i
/ BCL 501
i
is assigned its own
i
BCL 501
slave n
Leuze electronic
i
i
/
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