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Entry type: Application example Entry ID: 87447188, Entry date: 05/15/2014

S7-based Telecontrol via DNP3 Protocol

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Task The remote stations “Pipeline” and “Oil Tanks” must be controlled and monitored from a central control station. ...

The remote stations “Pipeline” and “Oil Tanks” must be controlled and monitored from a central control station.
Automation problem requirements:

  • The control station must be capable of requesting process data from the outstations.
  • The control station must be able to send commands and setpoint values unsolicited to the outstations.
  • The outstations must be able to send process data to the control station unsolicited.
  • In the case of a cancelled connection, process data must be saved in the outstations and be sent to the master after the connection has been established again.
  • For the implementation, a standardized protocol must be used.

This application shows a complete configuration of a DNP3 system with SIMATIC components. The control station uses telecontrol protocol DNP3 to communicate with the outstation via Ethernet.

  • At the control station, the WinCC TeleControl software is installed, which makes the control station the DNP3 master.
  • An S7-300 CPU with TIM3V-IE DNP3 as DNP3 station is installed on outstation “Pipeline”.
  • Outstation “Oil tanks” consists of an S7-1200 CPU and a CP 1243-1 DNP3. (The CP is responsible for the communication with the control station.)
    The two following solutions were offered for the hardware configuration.

Configuration via internet/VPN
A Virtual Private Network (VPN) is configured for the master to communicate with the stations via the internet. In this example, a DSL connection is available at the master. In addition, a SCALANCE S612 VPN module is installed. In each of the outstations, a SCALANCE M874-3 UMTS and VPN router (incl. SIM card and antenna) is used, which establishes the VPN tunnel to the SCALANCE S612 in the control station. This enables a secure communication via the internet / mobile radio network.

Configuration via LAN
As an alternative for the solution via internet/VPN, the solution via a switch is offered. In this case, the master and the stations are connected via a local network (LAN). The figure below gives a schematic overview of the most important components of the solution:

The solution presented here offers you the following advantages:

  • Using the standardized DNP3 protocol
  • Efficient and secure monitoring and control of process engineering plants
  • Homogenous SIMATIC solution since the SIMATIC Portfolio offers software and hardware for DNP3 master and outstations.
  • Connection to all standardized DNP3 master systems
  • Flexible expansion to up to 65519 outstations


Content of Downloads


87447188_DNP3_Telecontrol_v10_e.pdf ( 4738 KB )
This zip file includes:
  • STEP 7 V5 project (incl. SINAUT project)
  • STEP7 V12 project
  • WinCC project (incl. WinCC TeleControl project)
  • SCT configuration
  • SCALANCE M configuration
87447188_DNP3_Telecontrol_CODE_v10.zip ( 97409 KB )

Further Information



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Additional Keywords
Remote control, WAN, Binary, Analog, Command, Counter, TD7

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