
Rockwell Automation Publication 2080-UM002N-EN-E - November 2022
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Chapter 6 Micro870 Controller Distributed Network Protocol
Enable Master Address Validation
Valid selections are Enabled (Checked) and Disabled (Unchecked). Default value is Disabled
(Unchecked).
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 which is configured in the Master Node0…Master Node4. The maximum number
of Master Node Addresses for the Master Address Validation is 5.
Enable Self-Address
Valid selections are Enabled (Checked) and Disabled (Unchecked). Default value is Disabled
(Unchecked).
When this bit is Disabled (Unchecked), any packets which contain the destination address
65532(FFFCh) are ignored.
When this bit is Enabled (Checked), any packets which contain the destination address
65532(FFFCh) are accepted and processed.
Any responses back to the DNP3 Master includes the actual configured DNP3 address of the
Micro870 controller.
Master Node0
This value is used to:
• Validate the Master node address when the Enable Master Address Validation is Enabled
(Checked).
• Vend 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
The valid range is 0…65519. Default value is 0.
This value is used to check validation for Master node address when Enable Master Address
Validation is Enabled (Checked).
Control Line
The selections can be No Handshake and Half-Duplex without continuous carrier (CTS/RTS).
Default selection is No Handshake.
When the controller is connected to DNP3 Master using RS-232 line directly, you must select No
Handshake. If you want to use the Modem line in a half duplex network, you must select Half-
Duplex without continuous carrier (CTS/RTS). If the controller is connected to an RS-485
network, you must select No Handshake.
Request LL Confirmation
Valid selections are Enabled (Checked) and Disabled (Unchecked). Default value is Disabled
(Unchecked).
When the selection is Disabled (Unchecked), Primary Frames from the controller are sent out
with the function code FC_UNCONFIRMED_USER_DATA (4).