YOKOGAWA Vnet/IP, Technical Information

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2. Vnet/IP Network Configuration
2-6
TI 30A10A05-01E
2.2 Network Configuration Example
2.2.1 Connection within a Domain
n
System configuration for a single domain
There can be up to 64 Vnet/IP stations in one domain.
The following figure shows an example of a system configuration that consists of two HISs, one
SENG, two duplexed FCSs, and one duplexed SCS.
020201E.ai
L2SW
(Bus 1 side)
HIS0164 HIS0163 SENG0162
FCS0101
FCS0102 SCS0103
Information Network
L2SW
(Bus 2 side)
Figure Example of system configuration for a single domain
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Number of ports required for layer 2 switches
One layer 2 switch manages the network of one bus. You need at least one layer 2 switch for
each bus 1 and bus 2. Use the following equation to calculate the number of ports required for a
layer 2 switch.
Number of ports required for a layer 2 switch
= (number of Vnet/IP stations that use Vnet/IP interface cards)
+ (number of single FCSs and single SCSs)
+ (number of duplexed FCSs and duplexed SCSs) x 2
In the previous figure, the system configuration uses two HISs, one SENG, two duplexed FCSs,
and one duplexed SCS. The number of ports required is calculated as (2+1) + (2+1) x 2 = 9.
Therefore, nine ports are required on bus 1 and nine ports are required on bus 2.
Aug.19,2011-00