Barcode reader VB34
Installation
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Subject to reasonable modifications due to technical advances.
Copyright Fuchs, Printed in Germany
Fuchs Group • Tel.: G49 621 776-0 • USA +1 330 4253555 • Sin65 67799091 • Internet http://www.pepperl-fuchs.com
6.7.3
RS232 master/slave
In the RS232 master/slave arrangement, all VB34 models can be integrated into a
network with different readers, without the need for a Lonworks interface.
The readers operated as the slave only communicate via the primary and secondary
RS232 interfaces. Each slave device also provides the messages, which it received
on the secondary interface, via the primary interface. All messages are transmitted to
the master.
The master reader is connected via the primary RS232 interface and a C-BOX 100 to
a computer. If the INT-60 accessory option is installed, a 20 mA current loop can be
used.
For the RS232 master/slave arrangement, a central external trigger signal is used (a
light barrier).
*) Light barrier (presence sensor) connected to the external trigger input .
(1) Primary serial interface
(2) Secondary serial interface
Figure 6.50
RS232 master/slave for VB34 master/slave models
The VB34 reader (master/slave variant only), which is used as the
master in a RS232 network, can simultaneously be connected to a
Lonworks network with VB34 slave readers. When assigning slave
addresses, note that the number of the first Lonworks slave must
follow on seamlessly to the number of the last slave reader in the
RS232 network. If, for example, the RS232 network consists of the
devices slave 1 and slave 2 , the first slave device in the Lonworks
network is slave 3 (not slave 1).
Note
