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