Uses and properties of the TIM
1.4 Communications services of the TIM
TIM DNP3
System Manual, 12/2015, C79000-G8976-C253-04
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Communications services of the TIM
DNP3 communication
The communication of the TIM is based on the DNP3 SPECIFICATION Version 2.x
(2007/2009).
This handles the data traffic for the S7-CPU or for the control center PC with the aid of the
DNP3 protocol via the relevant network.
DNP3 conformity level of the TIM
The DNP3 specification divides devices into classes according to their range of functions.
The DNP3 TIM supports the DNP3 implementation levels 1 - 4 according to the DNP3
specification (DNP3 Application Layer protocol Level).
Some communications objects of the TIM provide functions that go beyond the DNP3
specification, refer to the section Supported DNP3 object groups (Page 162). The DNP3
implementation level of these objects is designated "5".
To ensure that the communications functions are possible during operation, the
implementation level of every DNP3 subscriber in the project is specified in the TD7onTIM
configuration.
The TIM supports S7 communication and PG/OP communication with the following
functions:
● PG functions
● Operator control and monitoring functions (HMI)
● PUT/GET (TIM 4R-IE only)
The TIM 4R-IE supports the PUT/GET services as client and server for data exchange
with remote S7-300/400 stations.
Devices that communicate using the MODBUS protocol can be connected as MODBUS
slaves to a SIMATIC S7 station with a DNP3 TIM. The TIM of the S7 station operates as
MODBUS master.
The communication is handled in the S7 station via the serial interface of a DNP3 TIM. The
serial interface of the TIM is configured for this purpose in the SINAUT configuration tool for
the MODBUS protocol.
You will find the number of MODBUS slaves that can be connected per station in the section
Configuration limits (Page 28).
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