Rockwell Automation Publication 1766-UM001O-EN-P - September 2021 253
Appendix F MicroLogix 1400 Distributed Network Protocol
• 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
• Hold Time after Class3 Events (x1s)
• DNP3 Object Data File Number
• DNP3 Object Config File Number
• content of the Config File
In some cases, the controller may not send an Unsolicited Response even
though the parameters are configured properly.
• Normally, when the parameter Enable Unsolicited On Start Up is
checked, the controller initiates an Unsolicited Response with the
function code ENABLE_UNSOLICITED(20), if there are any events
logged into the event buffer. However, when a request with the function
code DISABLE_UNSOLICITED(21) is received, an Unsolicited Response
will not be sent.
• When the parameter Enable Unsolicited On Start Up is unchecked, the
controller does not trigger the Unsolicited Response until a request with
the function code ENABLE_UNSOLICITED(20) from the DNP3 Master is
received.
Figure 75
shows how to initiate and send the Unsolicited Response. Master
Node 0 in Channel 0 Configuration tab indicates that the Unsolicited
Response is reported to the Master with the node address 3.
Figure 75 - Initiate and Send Unsolicited Response
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