ZIV 7IRD-A - Description of Operation; DNP 3.0 Protocol; Settings

Annex B. DNP 3.0 Communications Protocol
B-3
M7IRDA2003I
7IRD-A/J/M: Distribution Protection & Control Terminal
© ZIV APLICACIONES Y TECNOLOGÍA, S.L.U. 2020
B.3 Description of Operation
B.3.1 DNP 3.0 Protocol
The models with the option DNP 3.0 communication protocol present the following configuration
settings:
 DNP Configuration Settings
MTU Address
Destination address of the Master device to which the unsolicited responses are to be sent.
Addresses 0xFFF0 to 0xFFFF are reserved as Broadcast Addresses. It is useful only when
Unsolicited Reporting is enabled.
RTU Address
Remote Terminal Unit Address. Addresses 0xFFF0 to 0xFFFF are reserved as Broadcast
Addresses.
Unsol Enable
Enables (YES) or disables (NO) sending spontaneous messages (Unsolicited); it is used in
combination with the MTU Number parameter. For the 7IRD relay to begin sending
spontaneous messages the master must also enable them with the Function Code FC = 20.
Time out N7
It specifies the time lapse (in milliseconds) from the time the 7IRD sends a message requesting
the master to confirm the Application layer (Level 7), until this confirmation is considered lost.
The 7IRD requests confirmation of the Application Layer when it sends spontaneous
(Unsolicited) messages or in response to requests for Class 1 or Class 2 Data. When this time
expires, the message is retransmitted the number of times specified in the N. Retries
parameter.
Unsolicited Delay Reporting
Delay between an event being generated and the subsequent transmission of the unsolicited
message, in order to group several events in one message and to save bandwidth.
N7 Retries
Number of retries of the Application Layer (N7). The default value is 0 (zero), indicating that no
retransmission will be attempted.
Pre-Transmission
Time setting which generates the number of warning characters.