5 USER GUIDE
5-24
5.2.9 Message
transmission
(1) Message transmission overview
The message transmission function supports asynchronous data exchanges that are made
between nodes.
The fundamentals of the message transmission function are described below.
When a node receives the token, it can transmit up to one frame of data before cyclic frame
transmission.
The maximum amount of data that can be transmitted in one session is 1024 bytes.
A special algorithm is employed to ensure that the refresh cycle time limit for cyclic
transmission is not exceeded.
One-to-one transmission for sending data to a preselected remote node and one-to-n
transmission for sending data to all nodes are both achievable.
In one-to-one message transmission, the delivery verification feature is available to check
whether transmitted data is properly received by a recipient.
Reception
Reception
Reception
Request
Response
Request
Node 1
Node 1
One-to-one transmission
Node 2
Node 3
Node 4
One-to-N transmission
Node 2
Node 3
Node 4
Figure 5-25 Message Transmission Overview
Summary of Contents for FL.NET
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Page 29: ...1 OVERVIEW ...
Page 33: ...2 FL NET MODULE ...
Page 42: ...3 FL NET MODULE INSTALLATION ...
Page 46: ...4 FL NET MODULE WIRING PROCEDURES ...
Page 53: ...5 USER GUIDE ...
Page 203: ...5 USER GUIDE 5 151 Sample printout ...
Page 206: ...6 MAINTENANCE ...
Page 210: ...7 TROUBLESHOOTING ...
Page 225: ...8 APPENDIXES ...