Siemens SIMATIC TeleControl DNP3 Configuration Manual page 57

● Buffer for class 1 / 2 / 3 events
For each of the three event classes, this is where you specify the number of events after
which the stored events are sent to the communication partner.
Note that the maximum size of the send buffer is divided over all connected DNP3 master
stations.
Permitted range: 1 ... 255
● Delay time class 1 / 2 / 3 events
Here, for each of the three event classes you specify the maximum time in seconds for
which the events can be stored in the send buffer before they are sent to the
communications partner.
This requires unsolicited transmission to be configured (see below).
Permitted range: 0 ... 65535
With the setting 0 (zero), the function is disabled.
Node station
This parameter is only available for interfaces for which the network node type is set to
"Node station".
● Response without current station image
With an interface of the "Node station" network node type, the communication module of
the node station keeps the station process image in the image memory for each lower-
level DNP3 station.
– Option enabled
– Option disabled
Configuration - DNP3
Configuration Manual, 11/2018, C79000-G8976-C508-01
The module replies to a class 0 call even if the process image in the image memory of
the node station is not up to date. When a master station calls, the data of all
connected stations is sent to the master station, even if the data of one or more
stations is not up-to-date.
The module replies to a class 0 call only if the process image in the image memory of
the node station is up to date.
3.8 DNP3 parameters of the interfaces
Configuration
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