1. Overview of Vnet/IP
1-21
TI 30A10A05-01E
1.6
Conditions without an Information Network
For Ethernet communication, we usually recommend that you use an information network
that is independent from Vnet/IP. However, you can perform Ethernet communication by
using Vnet/IP bus 2 without the information network if all the following conditions are
satisfied:
• A system is composed of only Vnet/IP network and has no connection with V net or
VL net via V net router.
• A system includes none of the followings – Exaopc (*1), HIS-TSE, UGS (*2), SIOS,
GSGW, or APCS.
• No integration with ProSafe-RS.
• When using PRM, PRM server and field communications server run on the same PC,
and PRM client runs on a PC with Vnet/IP Interface Card, such as HIS or PC on which
field communications server runs.
• 16 or less PCs with Vnet/IP interface card for HIS and ENG. (*3)
• Instruments connected with L2SW for Bus 2 are Vnet/IP interface card’s Bus 2 port
mounted on the PC, a network printer (*4), and a file server (*4) only.
*1: NTPF100 Exaopc OPC Interface Package (refer to GS 36J02A10-01E). This condition is not applied for LHS2411 Exaopc OPC
Interface Package (for HIS).
*2: For the dual-redundant configuration of UGS, it is strongly recommended to perform Ethernet communication by the network
connected to a UGS’s Ethernet card, and do not use Vnet/IP Bus 2 communication. For more information about the dual-
redundant configuration of UGS, refer to “LBC1501 Dual-redundant Package (for UGS)” (GS 33K20C10-50E).
*3: When the number of PC with Vnet/IP interface card exceeds 16, it is suggested to perform Ethernet communication by the
network connected to a PC’s Ethernet card, and do not use Vnet/IP Bus 2 communication. When the number of PC exceeds 50,
this method is strongly recommended.
*4: When the Vnet/IP Bus 2 performs Ethernet communication, it is possible to connect a network printer or a fileserver to the Vnet/
IP Bus 2. However, the sum of the communication band by these equipments should not exceed 300 Mbps.
Open communication refers to the information network communication that is performed
through Vnet/IP bus 2. In Vnet/IP, bus 1 usually performs control communication and bus 2
performs open communication. However, when bus 1 fails, bus 2 performs both control and open
communications.
For more information about using Vnet/IP bus 2 to perform information network communication,
refer to Chapter 3 of this document.
Dec. 26, 2016-00
Summary of Contents for Vnet/IP
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