Allen-Bradley SLC 500 DeviceNet, User Manual, Page: 102 / 139

Publication 1747-6.5.5 - August 2000
A-2 Data Map Example
Example Framework
This example adheres to the following structure:
•
there cannot be any 1771-SDN scanners or other 1747-SDNs on
that network
•
DeviceNet devices may reside only at nodes 1-62
•
address 0 must be used for the scanner
•
the first word in the device input data table contains the module
status word (this is applicable under any mapping scheme)
•
input data and status bits received from nodes 1-62 are mapped
to the scanner’s discrete input data table
The following illustrates an input-data mapping scheme example for
the 1747-SDN scanner. Input bits are mapped from a device’s
message, to the scanner’s input data table, and to the processor’s input
image table.