11
6650-2260
Normal operation
When LRW-102 unit receives data from the LON network, the LRW-102 (the initiator)
will transmit the data onto the fibre ring. During normal operation the data will be
transmitted onto ring A. Data received by the other LRW-102 units in the ring is
transmitted over to the corresponding LON network as well as forwarded in the fibre
ring. When a LRW-102 initiator receives its own data packet, the packet it stopped. A
LRW-102 initiator will not forward another packet while waiting for its own packet to
return.
Redundant ring communications via fibre optic network
Under normal operation the
L
on
W
orks
®
data is sent over ring A. Should a fault be
detected on the fibre ring then the
L
on
W
orks
®
data will be carried on rings A and B.
The LRW-102 units could be linked together to form a fibre optic ring. With ring
topology, a built-in redundancy scheme offers communication fault tolerance.
Ring A
Ring B
TX
RX
TX RX
TX
RX
TX RX
TX
RX
TX RX
TX
RX
TX RX
CH 2
CH 1
CH 2
CH 1
CH 2
CH 1
CH 2
CH 1
LON
Network
LON
Network
LON
Network
LON
Network
