308 Rockwell Automation Publication 1766-UM001I-EN-P - June 2015
Appendix F MicroLogix 1400 Distributed Network Protocol (DNP3)
Reporting 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 237.
• Master Node0
• 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
• Hold Time after Class3 Events (x1s)
• DNP3 Object Data File Number
• DNP3 Object Config File Number
• content of the Config File
In some cases, MicroLogix 1400 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 MicroLogix 1400 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
MicroLogix 1400 does not trigger the Unsolicited Response until a request
with the function code ENABLE_UNSOLICITED(20) from the DNP3
Master is received.
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