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(3) Token and data
There are six data patterns that can be attached to and sent with a token, as follows.
Token and data
Item
No.
No data to attach
1
Token
Cyclic data only
2
Token + Cyclic data
Cyclic data sent in frames.
3
Token + Cyclic data
Message data only
4
Token
Cyclic data and message data
5
Token + Cyclic data
Cyclic data sent in frames and
message data.
6
Token + Cyclic data
Only sends the token
Only attaches cyclic data to the token
Sends only cyclic data. The token is attached to the
last frame.
Cyclic data
After sending the message data, passes the token along.
Message data
After sending the message data, sends the cyclic
data together with the token.
Message data
After sending the message data, the cyclic data is
sent by itself. Then the token is sent by attaching it to
the last frame.
Cyclic data
15-21
Chapter 15: Appendix
Details
Message data
15
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