Toshiba TC-net Instruction Manual page 78

5. Dual Function
Reference:
When ST1 is the state except "ONLINE", an OPC Client make access to ST2 with
"BACKUP" state.
STANDBY or DOWN
nVCON
70
Client Client
OPC Server
(ST1)
...
nVCON
...
Client
OPC Server
(ST2)
Talker : T1+T2
Read
...
nVCON
Ethernet
BACKUP
TC-net 100
nVCON