© Siemens AG 2011
DNP3 telecontrol protocol
Widely distributed outstations (RTUs) can be controlled and monitored with the DNP3 telecontrol protocol via serial or Ethernet TCP/IP communication links by means of the tele- control center in SIMATIC PCS 7. The control center integrated with SIMATIC PCS 7 TeleControl into the operator system of the process control system is the master during telecontrol communication.
The slaves are represented by the outstations. SIMATIC
Further hardware and software components round off the range of products:
•TIM communication modules
•TCP/IP converters – serial and MD modem modules
•GSM/GPRS components
•TCP/IP routers and switches
•SCALANCE S612 and S613 security modules
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•Cables
•Engineering package for configuration of DNP3 data objects, stations, networks and connections as well as for diagnostics
In order to implement the telecontrol networks, the basic topologies of
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| Control center |
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| Range without repeaters (example) | ||||||||||
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| SIMATIC PCS 7 TeleControl |
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| DNP3 master |
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| - 1 200 bit/s | max. 33 km | |||||||||
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| - 2 400 bit/s | max. 27 km | ||||
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| TCP/IP to serial |
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| - 19 200 bit/s | max. 11 km | ||||||
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| Ethernet |
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| converter |
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| RS 485 |
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| MD2 |
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| MD2 |
| MD2 |
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| Dedicated network | |||||||||
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| · · · |
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| with star topology | ||||||||
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| RTU |
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| RTU |
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| RTU |
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| Star + | ||||||||
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| TIM | MD2 |
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| DNP3 (slave) |
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| · · · |
| RTU |
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| TIM |
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| TIM | MD2 |
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| TIM | MD2 |
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| DNP3 (slave) |
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| DNP3 (slave) |
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| DNP3 (slave) |
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G_PCS7_XX_00267
DNP3 - example of classic dedicated network (star +
Classic WAN media
•Dedicated line via modem, e.g. SINAUT MD2
•Private wireless networks
•Analog telephone network
•Digital ISDN network
•Mobile radio network GSM