PSC LazerData 12000 Series, Installation Manual

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Installation Manual LazerData
®
12000 Scanner
Installation - 2.27
2.9.1 Master-slave
The master-slave layout is used to collect data from several scanners to build a
multi-sided reading system; there can be one master and up to 5 slaves connected
with the RS485-polled mode on the main serial interface.
The master scanner is also connected to a host computer with the RS232 auxiliary
interface.
The P.S. signal is unique to the system; there is a single reading phase and a single
message from the master scanner to the host computer.
In every scanner the jumper block for the selection of the main serial interface type
must be set for RS485-polled (see section 2.4).
In every slave scanner the multidrop address selection must be set within the range
from 0 to 4 max (see section 2.7.2 under "RS485-polled interface").
The DIP switch selections in the master scanner are ignored.
Host
1
3
2 Main serial interface
1
Auxiliary serial interface
3 Presence sensor
2
2
2
12000
Slave Scanner
12000
Slave Scanner
12000
Master Scanner
Figure 2.34 - Master-slave layout
NOTE
The auxiliary serial port of the slave scanners is only
used for configuration.
The termination resistors of the RS485 bus must not be
installed.