Yaskawa JAPMC-MC2303-E - Manual (Page 162)

Appendix B FL-net Network Management
B.5 FL-net Join Node Management Table
A-12
B.5 FL-net Join Node Management Table
( 1 ) Basic Function
The status of each node joining the network is monitored via the management table of the node. The management table
handles data managed in units of nodes for the nodes that join the network. The following gives a brief description.
• Each node receives a token frame at startup and updates the join node management table and network manage-
ment table.
• Each node updates the join node management table each time it receives a token frame.
• Each node also updates the join node management table each time it receives a new join request frame to newly
join the network.
• When no token frame has been received from a node or a time-out has occurred three times consecutively, each
node deletes the node from the join node management table.
( 2 ) Management Data
The token of each node is always monitored and the join node management table is created and managed.
Item Byte Length Contents
Node number 1 byte 1 to 254
Status of upper layer 2 bytes RUN/STOP/ALARM/WARNING/NORMAL
Area 1 data leading address in
common memory
2 bytes Word address (0 to 1FFH)
Area 1 data size in common
memory
2 bytes Size (0 to 1FFH)
Area 2 data leading address in
common memory
2 bytes Word address (0 to 1FFFH)
Area 2 data size in common
memory
2 bytes Size (0 to 1FFFH)
Refresh cycle allowable time 2 bytes Unit: 1 ms (1 to 65535)
Token monitoring time 1 byte Unit: 1 ms (1 to 255)
Minimum allowable frame interval 1 byte Unit: 100 μs (0 to 50)
FA link status 1 byte Join/leave information, etc.