Rockwell Automation 1761-NET-DNI DeviceNet Interface (DNI) - Manual (Page 34)

Publication 1761-UM005B-EN-P - October 2006
34 DNI Configuration Parameters and Programming Notes
Input Word Offset
This parameter identifies the starting word within the input file
identified by the parameter Input Data File. The value entered is the
first word of data that is read from the controller attached to the DNI.
The sizes of compatible data files within Allen-Bradley controllers vary
based on the DFI device selected.
Parameter
Type Parameter Number Description Range Default Value
Series A Series B
I/O 7 5 Input Word Offset 0…254 0
Compatible Data File Sizes
Controller Input Data Files File Size
MicroLogix 1000 Bit 32 Words
Integer 105 Words
SLC/Other MicroLogix Bit 255 Words
Integer 255 Words
PLC Bit 999 Words
Integer 999 Words
TIP
The DNI can only access files 3 through 254.
IMPORTANT
You must have sufficient room in the file that you
select. Make sure the Input Word Offset plus the
Input Size does not exceed the boundary of the
controller’s data file. For example, a MicroLogix 1000
controller has 32 words in its bit file; therefore, you
could not use a Input Word Offset of 30 and a Input
Size of 5 because this exceeds the file size.