5.4 PASS-THROUGH
The pass-through layout allows each device to collect data from one or more pass-through
input channels and send this data plus its own on one or more different output channels.
In this way independent devices can be connected together in combinations to create multi
device networks. Many devices reading independently can send their messages through a
common output channel which instead of being directed at a Host can be collected by
another device on its pass-through input channel and sent to a Host on a different output
channel.
Figure 52 – Pass-through Layout
In a Pass-through layout each device supports multiple pass-through configurations to accept
input from different devices on different channels (i.e. middle reader above). However, readers
are not required to have a pass-through configuration if they don’t need to receive data from
an input channel (i.e. right reader above). The overall data collection device always has at
least one pass-through configuration to collect the input data from the other devices and
send it to the Host (i.e. left reader above).
All devices always support multiple output channels (i.e. for data monitoring).
In a Pass-through layout each device can have a different operating mode: Continuous, One
Shot, Phase Mode, etc.
= Ethernet TCP/IP Server 1
= Ethernet TCP/IP Server 2
= Main Serial Interface (RS232 or RS422 Full-Duplex)
= Pass-through Input channel
= Output channel
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