YOKOGAWA Vnet/IP, Technical Information

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1. Overview of Vnet/IP
1-17
TI 30A10A05-01E
n
Connection with existing systems
You can use V net routers to connect systems that include V net or VL net domains to Vnet/
IP domains. You cannot connect Vnet/IP domains directly to HF Bus domains of the CENTUM
XL system or RL Bus domains of the CENTUM μXL system. However, you can set up the
connection by passing through a bus converter (BCV) from the V net domain that is connected to
the V net router.
Devices connected:
V net routers and bus converters
Number of hierarchical connections through a V net router (*1):
Three (two levels of bus converters, three levels of control buses)
*1: The number of levels of Vnet/IP domains and V net routers are not counted as an acceptable number of hierarchical V net
connections.
The following figure shows the number of levels in a specific hierarchical structure.
010405E.ai
HIS ENG SENG HIS
L2SW
BCV-V
BCV-V
L2SW
BCV-H
FCS SCS EFCS
V net Domain
V net Domain
V net Domain HF bus Domain
FCS SCS
SCS FCS
V net
router
FCS SCS
V net Domain
V net
router
Vnet/IP Domain Vnet/IP Domain
L3SW
Bus converter (0 level),
one control-bus level
connected via a V net
router
One control-bus level,
two control-bus levels
connected via a V net
router
Bus converter (0 level),
one control-bus level
connected via a V net
router
Two control-bus levels,
Three control-bus levels (max.)
connected via a V net router
Upper
Lower Lower
Upper
L3SW: Layer 3 switch
L2SW: Layer 2 switch
BCV-V: Bus converter for V net
BCV-H: Bus converter for HF bus
Figure Example of Expanded System Configuration
Dec. 26, 2016-00