82 Rockwell Automation Publication 2080-UM002M-EN-E - April 2022
Chapter 6 Micro870 Controller Distributed Network Protocol
The End Point type can be determined by the parameter End Point Type.
According to the parameter, the controller works as different End Point types.
See Table 6
for each configuration.
The parameter DNP3 over IP Enable is configured in the Ethernet
configuration page and other parameters are configured in the DNP3 Slave
configuration page.
DNP3 over IP Enable
The valid selections are Enabled (Checked) and Disabled (Unchecked). Default
value is Disabled (Unchecked).
When the selection is Disabled (Unchecked), DNP3 service over Ethernet is
disabled after the configuration is downloaded to the controller.
When the selection is Enabled (Checked), DNP3 service over Ethernet is
enabled after the configuration is downloaded to the controller.
Enable Master Address Validation
The valid selections are Enabled (Checked) and Disabled (Unchecked). Default
value is Disabled (Unchecked).
Table 6 - End Point Types
End Point Type Connection Description
Listening End Point
A single TCP server connection
Any of the requests are accepted and the responses
are transmitted via this connection.
The unsolicited responses are transmitted via this
connection when this connection is available.
UDP datagram
Accepts only broadcast packets when DNP3
destination node is one of 0xFFFD, 0xFFFE and
0xFFFF in the request.
Dual End Point
A single TCP server connection
Any of the requests are accepted and the responses
are transmitted via this connection.
The unsolicited responses are transmitted via this
connection when this connection is available.
This connection has higher priority than the Client
connection.
A single TCP client connection
Any of the requests are accepted and the responses
are transmitted via this connection.
The unsolicited responses are transmitted via this
connection when this connection is available.
The controller does not request TCP client connection
to DNP3 Master until an unsolicited response is
generated.
UDP datagram
Accepts only broadcast packets when DNP3
destination node is one of 0xFFFD, 0xFFFE and
0xFFFF in the request.
Datagram End Point UDP datagram only
Any of the requests are accepted and the responses
are transmitted via this connection.
All responses can be transmitted to the different
DNP3 Master port according to the configuration of
the parameters Remote UDP Port Number and Master
IP Address0. If this parameter is not set to 0, the
solicited responses are sent to the DNP3 Master port
that is configured. If this parameter is set to 0, the
solicited responses are sent to the DNP3 Master port
that sent the request.
TCP connection is not available in this configuration.
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