Fl-Net Participating Node Management Table - Sharp JW-20FL5 User Manual

[5] FL-net Participating node management table

(1) Basic functions
The status of each node is monitored by the management table which each node keeps for itself.
This table handles the data used to control each node participating in the network. The operation is
outlined below.
When starting, it receives a token frame and refreshes the participating node management table
and network management table.
Each node refreshes its own participating node management table when it receives a token
frame.
Renews the participating node management table when receiving a participation request frame
of a new entry.
Delete any node that does not send a token frame or which times out three times in a row.
(2) Control data
The participating node management table contains data related to the nodes currently participating
in the network.
Participating node management table
Node number
Upper layer status
Area 1 of common memory: Data top address
Area 1 of common memory: Data size
Area 2 of common memory: Data top address
Area 2 of common memory: Data size
Allowable refresh cycle time
Token monitor time
Minimum separation of frames
Link status
- "0x1ff" is the hexadecimal notation for 1FF
Note: This information is contained in the token frame received.
Item
15-27
Number
of bytes
1 byte 1 to 254
2 bytes RUN/STOP/ALARM/WARNING/NORMAL
2 bytes Word address (0 to 0x1ff)
2 bytes Size (0 to 0x1ff)
2 bytes Word address (0 to 0x1fff)
2 bytes Size (0 to 0x1fff)
2 bytes In units of 1 msec.
1 byte In units of 1 msec.
1 byte In units of 100 µsec.
1 byte Participate/leave
.
(HEX)
Chapter 15: Appendix
Description
15