Pepperl+Fuchs WHA-GW Manual page 14

WHA-GW-*
Product Specifications
Figure 2.3Network structure and corresponding I/O structure
1 HOST application
2 WirelessHART Gateway
3 WirelessHART field device (joined first): I/O card 0, channel 0
4 WirelessHART adapter (joined second): I/O card 1, channel 0
5 Wired devices 1...3 connected to WirelessHART adapter: I/O card 1, channel 1
If a WirelessHART device loses communication to the Gateway, it keeps its position in the
Gateway's Instrument List and stays assigned to the respective I/O card. When
communication is established again, the device has the same channel/card values that it
had before.
The same principle applies to the field devices connected to the WirelessHART adapter:
After communication to the Gateway was lost, the field devices regain their previous
position in the Instrument List as soon as communication is established again.
Note!
The Instrument List is stored in a non-volatile memory. Card/channel number assignment
will remain the same after a Gateway power-up or software restart.
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