Chapter 7: Computer Link Function

[3] Data communication type

FL-net data communication supports both "cyclic transfer" and "message transfer."

Message

Cyclic datadata with Token

Cyclic transfer

Cyclic transfer + 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.

 

 

 

7

Token

Data

 

 

 

 

 

 

 

 

Node

Node

Node

Node

Node

 

1

2

3

...

0

 

Node 1

Node 1

Node 1

Node 1

Node 1

 

Node 2

Node 2

Node 2

Node 2

Node 2

 

Node 3

Node 3

Node 3

Node 3

Node 3

Common

Node 4

Node 4

Node 4

Node 4

Node 4

memory

 

Node n

Node n

Node n

Node n

Node n

 

Example of a common memory and cyclic transfer

7-9