Configuration in STEP 7
5.6 Configuring networks and network nodes in STEP 7 / NetPro
TIM DNP3
System Manual, 06/2014, C79000-G8976-C253-03
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In the "Message parameters" box, the following parameters are displayed grayed out:
● Message format:
For DNP3 dedicated lines, this parameter has the default setting "FT3" and this cannot be
changed. FT3 is recommended in the DNP3 specification.
For dial-up networks, the following values can be configured:
– FT1.2 (8E1):
Character format 8 data bits,
even parity, 1 start bit, 1 stop bit
Modem setting: Data format 11 bits
– FT2 (8N1):
Character format 8 data bits,
no parity, 1 start bit, 1 stop bit
Modem setting: Data format 10 bits
– FT3:
Character format 8 data bits,
no parity, 1 start bit, 1 stop bit
Modem setting: Data format 10 bits
You will find information on setting the message format of the modems in the
documentation of the modems, refer to the Appendix.
● Acknowledgment:
The acknowledgment type does not depend on the modem used. It is set dependent on
the quality of the transmission line.
Default: short acknowl.
For DNP3 dedicated lines, this parameter has the default setting "Short acknowl." and
this cannot be changed.
For dial-up networks, the following values can be configured:
– short acknowl.:
consists of one byte.
– long acknowl.:
consists of 5 bytes. The long acknowledgment is advisable in applications when
interference produces spurious characters on the transmission line that could be
interpreted by the TIM as a short acknowledgment.
example: Bad wireless link
● WAN protocol:
For DNP3 dedicated lines, this parameter has the default setting "DNP3" and this cannot
be changed.
For DNP3 dial-up networks, select the setting "FT3".
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