Rockwell Automation 1440-SDM02-01RA XM-124 Standard Dynamic Measurement Module - Manuel (Page 91)

Rockwell Automation Publication 1440-UM001C-EN-P - May 2014 91
Configure the XM-124 Standard Dynamic Measurement Module Chapter 2
The importance of this is that it lets you do the following:
• Limit the amount of data transmitted to just that which is necessary for
the application. This minimizes the network loading on the DeviceNet
network.
• Minimize the amount of scanner space required. DeviceNet scanners
provide no more than about 500-bytes for their input table. By minimizing
the size of the output table from each module, you can optimize the space
available in their scanner table.
Custom Assembly
In some cases, the predefined assembly instance does not include the desired data
in the required order. In these cases, a custom assembly can be specified.
To define a Custom Assembly click Custom Assembly on the dialog box to open
the Custom Assembly Configuration editor.
Figure 43 - 1 Custom Assembly Configuration Dialog Box
IMPORTANT If a Custom Assembly is used, then the data in the controller table is not
individually identified. It is up to you to map the desired data from the
appropriate location in the table.