Westermo LRW-102 - Manual (Page 10)

10 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 trans-
mitted 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 initia-
tor 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 topol-
ogy, 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