Omron CJ1W-FLN22, Руководство по эксплуатации, Страница: 234 / 277

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FL-net Network Control Appendix D
Leaving the FL-net
The node number of each node is checked when the token frame is received, and nodes that do not receive the
token frame for three successive passes of the token are removed from the network (including a token-holding
node that does not send the token after the token monitoring time has timed out). When a node is determined
to have been removed from the network, the node information is deleted from the management table.
Managing Node Status
Node status is managed using three types of management tables: Local node management tables, participat-
ing node management tables, and network management tables. A summary of these tables is provided below.
FL-net Local Node Management Table
Basic Functions
The data for setting local nodes is managed using the local node management table, as shown in the following
table.
1. Local node management tables are used to read participation request frames and network parameters.
2. Management data is set from the FL-net upper layer when the node is started.
3. The node name and beginning address and size of the send area in Common Memory can be set from the
CX-FLnet or FL-net Unit Support Software connected to the PLC.
Management Data
3 to 4 4 to 5 N to 1 1 to 2 N to 1 1 to 2 N to 1 1 to 2 N to 1
N to 1
First cycle
Second cycle
Third cycle
Token detection
stopped
Entry token detection time
Node monitor starts
(reset after power turned ON)
(Local node number
×
4 ms)
Participation request frame send wait time
Participation request
frame sent
Table Details
Local node management table Manages the local node settings.
Participating node management table Manages information on the nodes in the network.
Network management table Manages information that is shared by all nodes on the network.
Item Bytes Contents (data range)
Node number 1 byte 1 to 254
Common Memory Area 1 first word 2 bytes Word address (0 to 0x1ff)
Common Memory Area 1 data size 2 bytes Size (0 to 0x200)
Common Memory Area 2 first word 2 bytes Word address (0 to 0x1fff)
Common Memory Area 2 data size 2 bytes Size (0 to 0x2000) (See note.)
Upper layer status 2 bytes RUN/STOP/ALARM/WARNING/NORMAL
Token monitoring time 1 byte Unit: 1 ms