Example of complex TCP/IP-based WAN with cable and wireless networks

The telecontrol communication between a telecontrol center integrated in SIMATIC PCS 7 and its outstations (Remote Terminal Units) is based on SIPLUS RIC libraries and is possible via serial communication links as well as via Ethernet TCP/IP communication links – with telecontrol protocol option

• IEC 60870?5?104 (Ethernet TCP/IP)
• IEC 60870?5?101 (serial)

Advantages of the TCP/IP-based connection through IEC 60870?5?104 are simultaneous data transfer to multiple devices and diagnostics using SIMATIC Manager.

Security mechanisms are not defined in the application area of IEC 60870?5?104. Therefore, encryption of the user data (data integrity) and authentication of the communication partners must be implemented separately (Industrial Security).

The telecontrol center integrated with SIMATIC PCS 7 TeleControl into the operator system of the process control system is the master during telecontrol communication. The Remote Terminal Units (RTUs) are slaves of the control center on the one hand, but can additionally function as masters for subordinate outstations with the following protocols:

• IEC 60870?5?104 (Ethernet TCP/IP)
• IEC 60870?5?101 (serial)
• IEC 60870?5?103 (serial)

Note:

Telecontrol integration into the SIMATIC PCS 7 process control system using SIPLUS RIC libraries with IEC 60870?5?104 or IEC 60870?5?101 protocols requires one of the following software combinations:

• SIMATIC PCS 7 V8.2 and SIMATIC PCS 7 TeleControl V8.2
• SIMATIC PCS 7 V8.1 and SIMATIC PCS 7 TeleControl V8.1
• SIMATIC PCS 7 V8.0+SP1 and SIMATIC PCS 7 TeleControl V8.0+SP1/SP2
• SIMATIC PCS 7 V8.0 incl. Update 1 and SIMATIC PCS 7 TeleControl V8.0
• SIMATIC PCS 7 V7.1 and SIMATIC PCS 7 TeleControl V7.1