196 Rockwell Automation Publication 1766-UM001O-EN-P - September 2021
Appendix F          MicroLogix 1400 Distributed Network Protocol
When the selection is Disabled (Unchecked), the controller accepts the 
requests from any DNP3 Master.
When the selection is Enabled (Checked), the controller accepts the requests 
only from the DNP3 Master IP Address which is configured in the parameters 
Master IP Address0 to Master IP Address4. The maximum number of Master 
IP Address for the Access Control is 5.
End Point Type
The valid selections are Listening, Dual and Datagram Only. 
Default is Listening End Point Type.
Master Node0
This value is used to:
• validate Master node address when the Enable Master Address 
Validation is Enabled (Checked)
• send Unsolicited Response when Unsolicited Response functionality is 
enabled. An Unsolicited Response is sent out to the DNP3 Master having 
this address.
The valid range is 0…65519. Default value is 0.
Master Node1, Master Node2, Master Node3, Master Node4
This value is used for validation of the Master node address when the Enable 
Master Address Validation is Enabled (Checked). This value is only valid when 
the Enable Master Address Validation is Enabled (Checked).
The valid range is 0…65519. Default value is 0.
Master IP Address0
This value is used to:
• validate Master IP address when the Enable Access Control is Enabled 
(Checked)
• send Unsolicited Response when Unsolicited Response functionality is 
enabled. An Unsolicited Response is sent out to the DNP3 Master having 
this address.
The valid value is an IP address. Default value is 0.0.0.0.
Master IP Address1, Master IP Address2, Master IP Address3, Master IP Address4
This value is used for validation of the Master IP address when the Enable 
Access Control is Enabled (Checked). This value is only valid when the Enable 
Access Control is Enabled (Checked).
The valid value is an IP address. Default value is 0.0.0.0.
Remote TCP Port Number
This value is used to configure Master TCP Port Number for Unsolicited 
Response.
The valid range is 0…65535. Default value is 20000.