Rockwell Automation 1766-Lxxxx MicroLogix 1400 Programmable Controllers User Manual - Manual (Page 275)

Rockwell Automation Publication 1766-UM001H-EN-P - May 2014 235
MicroLogix 1400 Distributed Network Protocol (DNP3) Appendix F
For the MicroLogix 1400 Series B controllers:
Each of the data files for a DNP3 Object will have a file number in the user
memory as shown below. You can configure the Data file number for each DNP3
Object in the DNP3 Slave tab of the DNP3 Slave Application Layer
Configuration. File types for this object file can be Binary, Integer, Long, or Float
data files.
The file numbers for each DNP3 Object cannot be in conflict with each other.