Siemens SIMATIC MV440 Operating Instructions Manual page 324

Process interfacing via an automation system (PLC, PC)
10.7 Scanner portal application
Slave
In addition to the settings made in the section "Slaves and master", you also need to make
the following settings on all the slave readers.
Connections/interfaces: TCP
● IP Address: IP address of the master reader
● port: 666
● Time limit: 3 s
Connections/integration
● In the "Connection monitoring" group, the TCP idling string must be: "\04".
Options/Extras
● Disable the "Master reader" check box in the "Scanner portal" group.
Master
You also need to make the following additional settings on the master reader.
Connections/interfaces: TCP
● IP Address: IP address of the TCP partner of the master reader
● port: Port number of the TCP partner of the master reader
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SIMATIC MV420 / SIMATIC MV440
Operating Instructions, 04/2013, A5E02371045-06