284 Rockwell Automation Publication 1766-UM001I-EN-P - June 2015
Appendix F MicroLogix 1400 Distributed Network Protocol (DNP3)
To generate a Small BCD Object from the DNP3 Subsystem in the controller,
you should configure the Small BCD Object File Number in the DNP3 Slave
Application Layer Configuration file.
When a Small BCD Object File is configured, the Index number starts from 0. 1
word is used for 1 Index of Small BCD Object.
As an example, a Small BCD Object File is configured as shown below. Data File
N21 has 10 elements. Index 0 of the Small BCD Object is N21:0, Index 1 is
N21:1 and Index 9 is N21:9.
As an example, a Small BCD Config File is configured as shown below. The file
has 10 elements. B40:0/0 and B40:0/1 can be configured for Class Level 0, 1, 2 or
3 for DNP3 Index 0 of the Small BCD Object File. B40:1/0 and B40:1/1 can be
configured for Class Level for DNP3 Index 1 of the Small BCD Object File.
Default Class Level is 0. Any other bits are reserved.
In the example below, for Small BCD Config File, Class Level of Index 0 is
1(B40:0/0 and B40:0/1), Class Level of Index 1 is 2(B40:1/0 and B40:1/1),
Class Level of Index 2 is 3(B40:2/0 and B40:2/1), and Class Level of other
Indexes are 0.
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