Datalogic Scanning DS4300 manual 4 RS485 Master/Slave, Host

DS4300 DATALOGIC

2.6.4 RS485 Master/Slave

The RS485 master/slave connection is used to collect data from several scanners to build either an omni-directional or a multi-sided reading system; there can be one master and up to 5 slaves connected together.

The Slave scanners are connected together using RS485 half-duplex on the main serial interface. Every Slave scanner must have a multidrop address in the range 0-4.

The Master scanner is also connected to the Host on the RS232 auxiliary serial interface.

The External Trigger signal is unique to the system; there is a single reading phase and a single message from the master scanner to the Host computer.

It is necessary to bring the External Trigger signal to all the scanners.

The main and auxiliary ports are connected as shown in the figure below.

DS4300 Slave

1

DS4300

Slave

2

1

	3	* Master
1		Host
1	Auxiliary serial interface
2	RS485 HD Main serial interface
3	External Trigger

Figure 2.31 - RS485 Master/Slave layout

*DS4300 cannot be used as the Master in the RS485 Master/Slave layout. For a list of Master compatible scanners see the Guide to Rapid configuration in the WinHost Help On Line.

2.24- Installation