Omron CJ1W-FLN22, Operation Manual, Page: 232 / 277

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FL-net Network Control Appendix D
Token and Data Transmission Patterns
The following six types of transmission patterns can be used to send data with a token.
Frame Intervals (Minimum Allowable Frame Interval)
The frame interval is the time required until the local node sends a frame after receiving a token from another
node. The minimum allowable frame interval is the least time that a node must wait until it can send a frame.
FL-net uses the same minimum allowable frame interval for the entire network. Whenever a node joins or is
removed from the network, each node updates the minimum allowable frame interval by calculating the maxi-
mum value for the minimum allowable frame interval set by the nodes participating in the network.
Joining and Leaving the FL-net
Joining FL-net
When a node is started, it monitors the communications line until the entry token detection timer times out. If a
token is not received during this time, the node assumes the network has just been started and the node joins
the network as a node in a new network. If a token is received, the node assumes that the network is active and
the node joins the active network.
No. Pattern Details
1 No accompanying data Sending token only
2 Cyclic data only Cyclic data is sent, after which the token is sent.
3 Cyclic data only, which is split into different packets
and then sent Cyclic data is split into several packets and sent,
after which the token is sent.
4 Message data only Message data is sent, after which the token is sent.
5 Cyclic data and message data Message data and cyclic data is sent, after which the
token is sent.
6 Cyclic data and message data, of which the cyclic
data is split into different packets and then sent Message data is sent, after which the cyclic data is
split into several packets and sent, followed by the
token.
Token
Token
Cyclic data
Token
Cyclic data Cyclic data
Token Message data
Token
Message data Cyclic data
Token
Cyclic data Cyclic data Message data