Rockwell Automation DeviceNet System Quick Reference - Manual (Page 11)

DeviceNet System Quick Reference
DNET-QR001A-EN-E – March 2009 11
5. Press the Down Arrow to navigate to and select 5 – E1 Plus and press Enter .
A dialog box appears with the mapping details of the E1 Plus devices scanlist entry. You can
temporarily disable the 1756-DNB scanner scanlist entry.
6. Press SEL to select Mapping.
This entry lets you modify the size of the native data location for the controller you are using.
For example, the Logix-based controllers use a 32 bit Dword for each location in their data table
while some other controllers may use only a 16 bit word. Depending on the native data size of the
controller you are using, you may need to modify this entry, to accurately view the data mapping
assignments for a device in the scanlist.
• The input mapping line displays an 8 to signify an input size of 8 bytes of data going back to
the scanner.
• The next line displays D40:0 --- D41:31 to signify that the data starts at Dword 40, bit 0 of
the input table and continues contiguously to Dword 41, bit 31. Therefore the mapping takes
two complete, 32 bit, Dword locations in the data table. The output mapping line displays a 1
to signify an output size of 1 byte of data coming from the scanner.
• The last line displays D40:0 --- D40:7 to signify that the data starts at Dword 40, bit 0 of the
output table and continues contiguously to Dword 40, bit 7.
7. Press the Down Arrow to change the mapping value.
Notice the effect this change has on the mapping details.
8. Press ESC four times to return to the Network Who dialog box on the 193-DNCT terminal.