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Chapter 7: Computer Link Function
7
[3] Data communication type
FL-net data communication supports both "cyclic transfer" and "message transfer."
Type of data communication on the FL-net
(1) Cyclic transfer
With cyclic transfer, the JW-50FL sends data at certain intervals. Each node can share data through
a common (shared) memory.
Example of a common memory and cyclic transfer
Cyclic data
with Token
Cyclic transfer
Cyclic transfer + Message transfer
Message
data
Token Data
Node
1
Node 1
Node 2
Node 3
Node 4
Node n
Common
memory
Node
2
Node 1
Node 2
Node 3
Node 4
Node n
Node
3
Node 1
Node 2
Node 3
Node 4
Node n
Node
...
Node 1
Node 2
Node 3
Node 4
Node n
Node
0
Node 1
Node 2
Node 3
Node 4
Node n