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5 USER GUIDE
(2) Message transmission
Message transmission provides nonperiodic transmission of data. Under normal conditions,
communication is transmitted to a specific node upon request.
Message transmission from node
Node 1
5.1.4 Amount of data transmission
(1) Cyclic transmission
The entire network has 8.5k words (= 8k bits + 8k words). The maximum permissible
amount of transmission is 8.5k words per node. Note that each word consists of two bytes.
15
2
(2) Message transmission
The permissible amount of one message frame is maximum 1,024 bytes (excluding the
header).
1 to node 3
Node 2
Node 3
Figure 5-7 Typical Message Transmission
Area 1
Area 2
Figure 5-8 Data Amount of Cyclic Transmission
Figure 5-9 Data Amount of Message Transmission
Message transmission from node
FL-net
Node 4
0
2
8k words
8k words
Message frame
1,024 bytes
5-6
6 to node 4
Node 5
Node 6
Common
memory area
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