Yaskawa JAPMC-MC2303-E - Manual (Page 73)

5.2 About FL-net
5.2.1 FL-net Overview
5-6
( 3 ) FL-net Transmission Method Features
The features of FA link protocol layer of FL-net are as follows.
• The masterless token system is employed for transmission management to avoid collisions.
• A token is circulated in a specific time to regulate a refresh cycle.
• After the cyclic data is sent, a defined token is sent.
• The first started node sends a token first.
• When no token is sent in a specific time, the next node sends a token.
• Even when some nodes fail, the masterless token system ensures that the network continues to work.
• The operation mode (RUN/STOP) and hardware failure (ALARM) information control tables are prepared to
reference the operating status of other nodes.
( 4 ) FL-net IP Address
The IP address of each FL-net node must be defined using class C individually. The IP address is an address indicating
a specific node (station) for transmission by IP (Internet Protocol). For this reason, the IP address must be set and man-
aged without duplication. FL-net uses the IP address of class C.
The default value of the FL-net IP address is 192.168.250. *** and *** indicates a node number.
( 5 ) Number of Connected Nodes and Node Numbers
The maximum number of connected nodes is 254. Numbers 1 to 254 are used as node numbers.
• Node numbers 1 to 249: For regular FL-net equipment
• Node numbers 250 to 254: For FL-net maintenance
• Node number 255: For internal use in FL-net. This number cannot be used by users.
(To be used for global address broadcast transmission)
• Node number 0: For internal use in FL-net. This number cannot be used by users.
Network address Host number (node number)
FL-net IP address 192.168.250. n (1 to 254)