Configuration in STEP 7
5.7 Configuring TIM modules
TIM DNP3
126 System Manual, 12/2015, C79000-G8976-C253-04
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Acknowledgment request (data link layer)
Here, you specify whether or not the TIM requests an acknowledgement from the
communications partner on the application layer with sent data messages (sending of the
function code "CONFIRMED_USER_DATA"). On Ethernet connections, the DNP3
specification recommends that the acknowledgement requests are not used on the data
link layer. On connections that are liable to disturbances, for example wireless links, the
configuration of acknowledgement requests can be useful on the data link layer.
Possible values:
– Never:
No acknowledgments are requested.
– Always:
Acknowledgments are always requested.
– When segmented:
Acknowledgements are only requested with data messages that are segmented due
to their length.
Default: When segmented
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Acknowledgment monitoring time [ms]
This value specifies how long an acknowledgement may take on the data link layer
before a message is entered in the diagnostics buffer of the TIM. The default value of
2000 ms normally only needs to be increased for slow serial connections.
Possible values: 0...65535
Default: 2000
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Here, you assign the port number via which the DNP3 station sends connection queries
to the DNP3 master station. The DNP3 specification recommends using port number
20000.
Possible values: 0 ... 65535
Default: 20000
"DNP3 event parameters" tab
This tab is shown only for interfaces with the connection mode "DNP3 station" or "node
station".
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