Figure 5-14 Typical Message Transmission; Figure 5-15 Data Amount Of Cyclic Transmission; Figure 5-16 Data Amount Of Message Transmission - Hitachi S10mini User Manual

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
5.2.4 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 1024 bytes (excluding the header).
1 to node 3
Node 2
Node 3

Figure 5-14 Typical Message Transmission

Area 1
Area 2

Figure 5-15 Data Amount of Cyclic Transmission

Figure 5-16 Data Amount of Message Transmission

Message transmission from node
FL-net
Node 4
0
2
8k words
8k words
Message frame
1024 bytes
5-14
6 to node 4
Node 5
Node 6
Common
memory area