MVI56E-FLN ♦ ControlLogix Platform
Reference
FA Control Network Ethernet Communication Module
User Manual
ProSoft Technology, Inc.
Page 109 of 155
Participating Node Management Table
This table manages information on the nodes in the network.
The node status of each node joining in the network is monitored by the
management table held by each node. Regarding the nodes joining the network,
this table handles the data to be managed for each node.
1
At a start, participating node management table and the network
management table is created in accordance with the received token frame.
2
Upon receipt of each token frame, each node updates the participating node
management table.
3
Upon receipt of the participation request frame for new joining, the joining
node management table is updated.
4
When non-reception of a token frame of each node or a timeout is detected 3
times running, the corresponding node is deleted from the table.
Table name
Size
Description
Node number
1 byte
1
to
249
if participating (a zero in this field
for a node indicates the node is not
participating on the network)
Upper layer status
2 bytes
RUN / STOP / ALARM / WARNING /
NORMAL
See status block for additional information
Common Memory Area 1 data first word
2 bytes
Word address (
0
to
1FF
H
)
Common Memory Area 1 data size
2 bytes
Size (
0
to
200
H
)
Common Memory Area 2 data first word
2 bytes
Word address (
0
to
1FFF
H
)
Common Memory Area 2 data size
2 bytes
Size (
0
to
2000
H
)
Allowable refresh cycle time
2 bytes
1 ms. (unit)
Token watchdog time
1 byte
1
to
255
ms
Minimum frame interval time
1 byte
1
to
50
(in units of 100 ms)
FA link status
1 byte
In-ring / out-ring information, and so on.
Network Management Table
This table manages information that is shared by all nodes on the network.
Table name
Size
Description
Token-holding node number
1 byte
Node currently holding the token
Minimum frame interval time
1 byte
1
to
50
(in units of 100 ms)
Allowable refresh cycle time
2 bytes
1 ms. (unit)
Refresh cycle measurement time (current)
2 bytes
0
to
65535
ms
Refresh cycle measurement time (maximum)
2 bytes
1 ms. (unit)
Refresh cycle measurement time (minimum)
2 bytes
1 ms. (unit)
