YOKOGAWA Vnet/IP, Technical Information

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1. Overview of Vnet/IP
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TI 30A10A05-01E
n
Connection within a Vnet/IP domain
A dual-redundant Vnet/IP bus consists of independent subnets, bus 1 and bus 2. A Layer 2 switch
is installed in each line.In Vnet/IP stations with dual redundant CPU modules, each CPU module
has ports for bus 1 and bus 2, which connect to layer 2 switches in their respective paths. You
can extend the paths up to 5 km by using optical fiber cables between layer 2 switches (*1). From
the operation and maintenance perspective, we recommend that you use the same number of
levels of layer 2 switches and path length for bus 1 and bus 2.
*1: In case further length is required, contact YOKOGAWA for details.
The following figure shows an example of a Vnet/IP domain configuration in which the central
control room is in a different location from the control device room.
010402E.ai
HIS 3 SENG
FCS 1
L2SW
HIS1/ENG HIS 2
L2SW
L2SW L2SW
FCS 2 SCS
Bus 1 Bus 2
Location A (Central Control Room)
Location B (Control Device Room)
Information Network
Vnet/IP
Interface Card
Vnet/IP
Interface Card
Vnet/IP
Interface Card
Vnet/IP
Interface Card
Figure Example of a Vnet/IP Domain Configuration
Dec. 26, 2016-00