ProSoft Technology MVI69-FLN - Manual (Page 98)

MVI69-FLN ♦ CompactLogix Platform Reference
FA Control Network Communication Module
Page 98 of 137 ProSoft Technology, Inc.
November 3, 2008
The range of top address and size of areas 1 and 2 of common memory are as
follows:
1 Top address of common memory area 1: (0…16#1FF)
2 Data size of common memory area 1: (0…16#200)
3 Top address of common memory area 2: (0…16#1FFF)
4 Data size of common memory area 2: (0…16#2000)
3.4.3 Node name (equipment name)
This can be set from the upper layer or by a network parameter write message.
When it is set from the network by using message transmission, the node does
not secede from the network if only the node name is changed, continuing
communication. The node name is set in ASCII character set up to 10
characters.
3.4.4 Token monitoring time
This time value is peculiar to each node. This time value is set from the FA link
protocol upper layer as the initial value. If this value is not set, the node is
inoperable.
The token monitoring time is notified to all nodes as information on the frame
header. Each node uses the value on the frame from each node as a value of the
monitoring time until token holding node releasing the token.
The watchdog time is set as 1 to 255 in the unit of 1 millisecond.
3.4.5 Allowable minimum frame interval
This interval value is a peculiar to each node. This value is set from the FA link
protocol upper layer as the initial value. If this value is not set, the node is
inoperable.
The allowable minimum frame interval is set to 0 to 50 (in units of 100
milliseconds).
The allowable minimum frame interval means the following 2 contents:
ƒ Time from receiving a token directed to the node until transmitting any frame
from the node.
ƒ Time of transmitting frame interval. (From the end of the previous frame until
the beginning of the next frame) The allowable minimum frame interval of
each node is notified to all nodes as information on the frame header. Each
node obtains the maximum value from it and recognizes it as the allowable
minimum frame interval to use.
Important Note: For this module to operate correctly on an FL-net network, this parameter must
be set to a value of 20 or more for all nodes on the network. If nodes on the network have values
less than 20 for this parameter, the module may not be able to join the network.