ABB XIO-08 - Local Access by Host

184 | XIO USER MANUAL | 2106424MNAA
Figure 10-3: RMC on 2-Network mode supports local access only
Legend: RMC on 2-Network mode supports local access only
ID
Name
ID
Name
1
Customer (TCP/IP) network
3
RMC: E2-LAN
2
RMC: E1-LAN
4
Local host system with PCCU
Figure 10-4 shows that remote access is only available to the RMC. Access to the XIOs is not possible in
this scenario as the RMC does not route between E1 and E2. Traffic from the network is not forwarded to
the XIOs.
Figure 10-4: RMC on 2-Nework mode isolates XIOs on local field network
Legend: RMC on 2-Network mode isolates XIOs on local field network
ID
Name
ID
Name
1
Local host system with PCCU
3
RMC: E1-LAN
2
Customer (TCP/IP) network
4
RMC: E2-LAN
10.4.2 Local access by host
Figure 10-5 shows the connections for local access by a host for devices daisy-chained in the field. In this
example, the RMC (3) is configured as a 2-port switch (Ethernet interfaces E1 and E2 are set to 1 Network
Mode). The XIOs (1, 2) are configured as 4-port switches (Ethernet interfaces A1, A2, B1, and B2 set to
4-port switch mode). The first XIO (2) connects to the RMC with A1, and to the second XIO (1) with A2.
To establish communication with the devices, the operator can connect the host system (5) to any of the
available ports without permanent connections. The figure shows two connections from the host as
examples, but only one physical connection is needed. When the host connects to either interface, it is