Rockwell Automation Publication 2080-UM002N-EN-E - November 2022 111
Chapter 6 Micro870 Controller Distributed Network Protocol
In this example, for 16-bit Analog Input point 0, if the absolute value of the difference between
the present value of variable AnalogValue1 and the value that was most recently queued as an
event for that point exceeds the deadband value in variable AnalogV1Deadband, then an event
is generated for that point.
Report Event By Polled Response
When a DNP3 Master sends a poll to read Class events, any events logged to the event buffer
are reported in the polled response.
Define the Number of Events for the respective Class event in the DNP3 Slave configuration
page as shown in the following example.
Report Event By Unsolicited Response
To initiate and send Unsolicited Responses to a DNP3 Master, the parameters below should be
configured correctly. For more details, see DNP3 Slave Application Layer Configuration
Parameters on page 79.
•Master Node 0
• Channel for Unsolicited Response
• Enable Unsolicited On Start Up
•Enable Unsolicited For Class1
•Enable Unsolicited For Class2
•Enable Unsolicited For Class3
• Send Initial Unsolicited On Start Up
• Number of Class1 Events
• Hold Time after Class1 Events (x1s)
• Number of Class2 Events
• Hold Time after Class2 Events (x1s)
• Number of Class3 Events
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