3.6 DNP3
DNP (Distributed Network Protocol) is for data and information exchange between SCADA
(Master) and IEDs (Intelligent Electronic Devices). The DNP protocol has been developed
in rst releases for serial communication. Due to further development of the DNP
protocol, it oers now also TCP and UDP communication options via Ethernet.
3.6.1
DNP Device Planning
Depending on the hardware of the proctective device up to three DNP communication
options are available within the Device Planning.
Enter the [Device Planning] device planning menu and select the appropriate SCADA
Protocol, depending on the device code.
• DNP3 RTU (via serial Port)
• DNP3 TCP (via Ethernet)
• DNP3 UDP (via Ethernet)
DNP Protocol General Settings
NOTICE!
Please note that unsolicited reporting is not available for serial communication, if more
than one slave is connected to the serial communication (collisions). Do not use in these
cases unsolicited reporting for DNP RTU.
Unsolicited reporting is available also for serial communication, if each slave is connected
via a separated connection to the Master-System. That means, the master is equipped
with a separate serial interface for each slave (multi serial cards).
Enter the menu [Device Para / DNP / Communication].
The Communication (General Settings) Settings have to be set according to the needs of
the Communication Master – System.
Self Addressing is available for DNP-TCP. That means that the Master and Slave id are
auto-detected.
NOTICE!
Some Output signals (that are for a short time active only) have to be acknowledged
separately (e. g. Trip signals) by the Communication System.
122 www.eaton.com EMR-3MP0
3 Communication Protocols
3.6 DNP3
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