Yokogawa YFGW410 - Manual (Page 21)

A4-1
IM 01W02D01-01EN
A4. YFGW410 in High-Level Redundancy
Configuration
HIS HIS/ENG PRM "Field wireless management PC
- Field Wireless Management Console" NTP server
Control network (Ethernet)
FCS
ALE111×2
L3SW
Ethernet
L2SW L2SW
Cable for Redundancy
Field Wireless
Management Station
(YFGW410)
L2SW (IEEE 1588) L2SW (IEEE 1588)
L2SW (IEEE 1588) L2SW (IEEE 1588) L2SW (IEEE 1588) L2SW (IEEE 1588)
Subnet A
Field Wireless
Access Point
(YFGW510)
Field wireless network
(ISA100.11a)
Field wireless device
Field Wireless
Access Point
(YFGW510)
Subnet B
Field Wireless
Access Point
(YFGW510)
Field Wireless
Access Point
(YFGW510)
Field wireless device
Field wireless network
(ISA100.11a)
FA0401.ai
Figure A4-1 High-Level redundancy system configuration of YFGW410
In this configuration, the system consists of redundant YFGW410 and redundant Modbus/TCP
client of the host system. Yokogawa’s Modbus/TCP client can be made redundant using the FCS
(Field Control Station) of CENTUM VP. For details, see the CENTUM VP User’s Manual
(IM 33K03L20-50E for R5, or IM 33M01A30-40E for R4).
The YFGW410 in redundant configuration operates as a single virtual machine for the Modbus/
TCP clients. Although the YFGW410 has the L2SW functions, the field wireless backbone net-
work can be expanded by adding another L2SW between the field wireless backbone devices.
The L2SW needs to be used which supports the IEEE 1588 v2 precision time protocol and the
RSTP or another loop detect functions. If a L2SW is used that is not supporting the IEEE 1588 v2
protocol and RSTP function, its operation is not guaranteed. Enable the IEEE 1588 v2 precision
time protocol of L2SW, and operate the switch in E2E 2-step TC mode. Also, enable the RSTP or
another loop detect function.