ProSoft Technology MVI69-FLN - Manual (Page 32)

MVI69-FLN ♦ CompactLogix Platform Start Here
FA Control Network Communication Module
Page 32 of 137 ProSoft Technology, Inc.
November 3, 2008
1.11 Configure the General Parameters
Configure the general parameters for your application. This example will consider
the following parameters:
Node Name : MVI69FLNET #identifies the node in the FLNET
network
Token Watchdog Time : 100 #token watchdog time (1..255) in ms
#(default=255)
Minimum Frame Interval Time: 20 #allowable min frame interval
#(20...50), #100 microsecond units
Note: Please refer to FL-net Node Configuration (page 97) for more information about these
configuration parameters.
1.12 Data Mapping Functionality
Note: Data Mapping is supported for MVI69-FLN firmware version 1.04 and above only.
The data mapping feature allows the optimization of data transfer from the
module to the ControlLogix processor.
1.12.1 Introduction
You can configure the sections of the A1 and A2 areas to be transferred to the
processor through the following parameters:
BP Area 1 Top : 0 #0...511 top address for area 1
BP Area 1 Size : 200 #0...512 area 1 data size in words
BP Area 2 Top : 0 #0...8191 top address for area 2
BP Area 2 Size : 1440 #0...8192 area 2 data size in words
However, the data associated to the nodes is not necessarily in a contiguous
order. Also, the application may require only specific data from each node that
could be spread over the configured area to be transferred to the processor. This
implementation may lead to the transfer of unused data to the processor, causing
unnecessary delays to the overall module performance.
Example 1
In this example, the module receives data from four different nodes associated to
the Area 2 common memory. Therefore, the module should be configured to
transfer the first 1200 words of data to the processor as follows:
BP Area 2 Top : 0 #0...8191 top address for area 2
BP Area 2 Size : 1440 #0...8192 area 2 data size in words
The module can only transfer a block of 240 words at a time. Therefore, for the
following application, the module would have to transfer unused data in order to
transfer the entire data associated to the four slaves to the processor. The result
is that unused blocks would have to be transferred, resulting in unnecessary
delay to the overall performance.