User Manual Manual

Rockwell Automation Publication 1766-UM001H-EN-P - May 2014 251
MicroLogix 1400 Distributed Network Protocol (DNP3) Appendix F
DNP3 Frozen Counter Object
The supported object group and variations are listed in this section. The
MicroLogix 1400 responds with the default group and variation when the DNP3
Master requests to read the object with all variations.
Frozen Counter Static Objects:
• g21v0 - Frozen Counter - All Variations
• g21v1 - Frozen Counter - 32-bit with flag
• g21v2 - Frozen Counter - 16 bit with flag
• g21v5 - Frozen Counter - 32-bit with flag and time
• g21v6 - Frozen Counter - 16-bit with flag and time
• g21v9 - Frozen Counter - 32-bit without flag (default)
• g21v10 - Frozen Counter - 16-bit without flag (default)
Frozen Change Event Objects:
• g23v0 - Frozen Counter Event - All Variations
• g23v1 - Frozen Counter Event - 32-bit with flag (default)
• g23v2 - Frozen Counter Event - 16-bit with flag (default)
• g23v5 - Frozen Counter Event - 32-bit with flag and time
• g23v6 - Frozen Counter Event - 16-bit with flag and time
Related Object File Number:
• 16-bit Counter Object File Number
• 32-bit Counter Object File Number
Related Configuration File Number:
• 16-bit Frozen Counter Config File Number
• 32-bit Frozen Counter Config File Number
To generate a Frozen Counter Object from the DNP3 Subsystem in the
controller, you should configure Counter Object File Number in the DNP3 Slave
Application Layer Configuration file.
The number of elements for Frozen Counter Object is the same as the number of
Counter Objects. For example, if 10 Counter elements were configured, 10
Frozen Counter elements will be generated in the MicroLogix 1400 controllers
internally. You cannot access the Frozen Counter database directly.
There is one buffer for Frozen Counter Object. Read the Frozen Counter Object
before you send another request with Freeze function codes. If two consecutive
Freeze function codes are received without Read operation into them for Frozen
Counter Object, the values of Frozen Counter Objects are overwritten by the
second Freeze operation.