Omron CJ1W-FLN22, Operation Manual, Page: 44 / 277

18
FL-net Section 2-1
Number of Connectable
Nodes and Node Numbers Up to 254 nodes can be connected to an FL-net network. Each node is
assigned a node number from 1 to 254.
Note 1. Not available to users.
2. Used for broadcasting.
Data Communications FL-net supports data communications by cyclic transmission and message
transmission.
Transmission Cycle With cyclic communications, the Common Memory is refreshed on a fixed
cycle time. Message communications are controlled so that the Common
Memory refresh time does not exceed the allowable refresh cycle time.
Each node constantly monitors the message communications frames that
travel through the network from the time it receives one local-node-directed
token until it receives the next local-node-directed token. When no message
communications frame travels through the network in a single cycle, 120% of
the cycle time value becomes the allowable refresh cycle time. In this way the
allowable refresh cycle time is actively determined according to the number of
nodes in the network.
Node number Applications
1 to 249 Used for standard FL-net devices.
250 to 254 Used for FL-net maintenance purposes.
255 Reserved for the internal system use. (See notes 1 and 2.)
0 Reserved for internal system use. (See note 1.)
192.
168.
250.
1
192.
168.
250.
2
192.
168.
250.
248
192.
168.
250.
249
192.
168.
250.
250
192.
168.
250.
254
Network address
Node number
FL-net
Node number: 1 to 249 (for users)
Node number: 250 to 254
(for maintenance)
Cyclic data with token
Message data
Cyclic transmission
Cyclic transm message transmission