224 Rockwell Automation Publication 1766-UM001O-EN-P - September 2021
Appendix F MicroLogix 1400 Distributed Network Protocol
Related Configuration File Number:
• Double Bit Binary Input Config File Number
To generate a Double Bit Binary Input Object from the DNP3 Subsystem in the
controller, you should configure Double Bit Binary Input Object File Number
in the DNP3 Slave Application Layer Configuration file.
When the Double Bit Binary Input Object File is configured, the Index number
starts from 0.
2 bits are used for one Index.
As an example, a Double Bit Binary Input Object File is shown below. This file
has 10 elements and 80 Double Bit Binary Input points. Index 0 of the Double
Bit Binary Input Object is B20:0/0 and B20:0/1, Index 1 is B20:0/2 and B20:0/3,
and Index 79 is B20:9/14 and B20:9/15.
As an example, a Double Bit Binary Input Config File is shown below. This file
has 10 elements. B39:0/0 and B39:0/1 can be configured for Class Level 0, 1, 2, or
3 for DNP3 Index 0…7 of the Double Bit Binary Input Object File. B39:1/0 and
B39:1/1 can be configured for Class Level for DNP3 Index 8…15 of the Double-bit
Binary Input Object File. Default Class Level is 0. Any other bits are reserved.
So, in the example below, Class Level of Index 0…7 is 1(B39:0/0 and B39:0/1),
Class Level of Index 8…15 is 2(B39:1/0 and B39:1/1), Class Level of Index 16…23 is
3(B39:2/0 and B39:2/1), and Class Level of other Indexes are 0.
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