Reference
MVI56E-FLN ♦ ControlLogix Platform
User Manual
FA Control Network Ethernet Communication Module
Page 112 of 155
ProSoft Technology, Inc.
FA Link Status
The information on link status is divided into two types: information shared on the
network and information to be managed by each node.
In-ring and out-ring of each node are managed in units of node. All information
except the above is shared on the network.
Message
Description
Address overlapping detection
Indicates that there is any overlapping setting in the common
memory of a node connected to the network.
Common memory setting
completion
Indicates that the setting in the common area of a node is
completed.
Common memory data validity
Indicates that cyclic data is effective.
Upper layer operation signal error
Indicates that updating of the existence signal of the upper
layer cannot be recognized.
Node in-ring / out-ring
Indicates the information managed to see whether each node
joins the network or secedes from it.
The MVI56E-FLN module allows the processor to dynamically set the module to
out-ring and then again to in-ring state. The output blocks that transfer Area 1
and Area 2 data from the ControlLogix to the MVI56E-FLN module (blocks 1 to
38) updates word offset 246 which is reserved for this purpose (in-ring and out-
ring command).
The sample ladder logic uses the
FLNETMODULE.CONTROL.In_Out_
RingCommand
controller tag to update this register. Setting a value of 0 will not
interfere on the module regular functionality (it will go in-ring once finds other
nodes in the network as defined in the protocol specification)
In order to monitor the in-ring and out-ring state the user can refer to the FA Link
status which according to the protocol specification is defined as follows:
