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Source
TOSHIBA
IED1
CPU
Data
L
I
R
Port B
Port A
Tx
Tx
Rx
Rx
O
CLEAR
A-Frame
Ring LAN1
B-Frame
B-Frame
TOSHIBA
Tx Rx
Tx Rx
Port A
Port B
LAN module
LAN module
(C11)
(C12)
Data
L
I
R
CPU
O
IED2
CLEAR
Figure 11.2-3 HSR example for ring-LAN with DANH
Note: Prohibition symbol () shows the frame is removed by the next terminals.
LRE switches
(ii)
The user should set On for both settings [LRE_PortA_EN] and [LRE_PortB_EN] so that the
LRE can duplicate the data for A-Frame and B-Frame.
Entry Forget Time
(iii)
Packets are transferred in A-Frame and B-Frame over the LAN. The user should set the
[EntryForgetTime] to delete a duplicated frame listed in the duplicating table. The duplicated
frame will be erased when it stays longer than the setting time.
For Figure 11.2-2 example, the IED1 (Source) duplicates data by the LRE. The duplicated
data (in A and B-Frames) are transferred simultaneously over the LAN_A and LAN_B. In the
meantime, both frames cannot arrive at Substation computer (Destination). If the duplicated
frame is older than the setting [EntryForgetTime], the duplicated frame will be removed.
The [EntryForgetTime] has default 400ms setting, but the user can change it for an
appropriate value among 100 to 10,000ms. The setting value should be taken account of the
Destination
Substation Computer
ENTER
Cancel
Port B
Tx
Rx
F1
F2
F3
F4
F5
B-Frame
A-Frame
A-Frame
QuadBox
QuadBox
ENTER
Cancel
Ring LAN2
F3
F1
F2
F4
F5
B-Frame
Tx Rx
Tx Rx
Port A
Port B
LAN module
LAN module
(C11)
(C12)
Data
CPU
IED3
- 867 -
Operator Workstation
CPU
Data
Port A
Tx
Rx
B-Frame
A-Frame
A-Frame
B-Frame
Rx
Tx
Tx
Port A
Port B
LAN module
LAN module
(C11)
(C12)
Data
CPU
IED4
A-Frame
TOSHIBA
ENTER
Cancel
L
I
R
F3
F1
F2
F4
F5
O
CLEAR
6F2T0207 (0.01)
CPU
Data
Port B
Port A
Tx
Tx
Rx
Rx
TOSHIBA
Rx
ENTER
Cancel
L
I
R
F2
F3
F4
F5
F1
O
CLEAR
GRE200 (5,6)
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