Siemens SIMATICS PCS7 brochure Migration of existing telecontrol systems, Third-party stations

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© Siemens AG 2011

Migration

Migration of existing telecontrol systems

Units with Modbus communication

SINAUT ST1 stations based on SIMATIC S5

The Modbus is widely used in automation plants due to its straightforwardness and openness. The Modbus telecontrol protocol can be used to implement both serial and TCP/IP com- munication links between a control center in SIMATIC PCS 7 and RTUs with a corresponding Modbus interface.

In this manner, existing units with a Modbus infrastructure can be integrated at low cost into the SIMATIC PCS 7 process control system. The RTUs of these units can be SIMATIC S7 controllers (SIMATIC ET 200S with integral CPU, SIMATIC

S7-300/S7-300F and SIMATIC S7-400/S7-400F) as well as third-party RTUs. Whereas RTUs with Modbus TCP/IP interface can be integrated directly, serial third-party RTUs require spe- cific interface converters for telecontrol communication.

Engineering data of third-party RTUs can be imported in CSV format into the PCS 7 TeleControl engineering (DBA). The sta- tus of the RTUs and the transmission paths is evaluated by the "Diagnostics Modbus RTU" block and displayed in the control center.

During the migration of existing systems, it is possible to inte- grate outstations based on SIMATIC S5 into the SIMATIC PCS 7 process control system using SIMATIC PCS 7 TeleControl. In the process, the ST1 telecontrol protocol is converted into the ST7 protocol in the central TIM communication module.

Third-party stations

In addition to the Modbus telecontrol protocol, the DNP3 (serial and TCP/IP), IEC 870-5-101 (serial) and IEC 870-5-104 (TCP/IP) telecontrol protocols basically also support the con- trol center linking of third-party RTUs when migrating existing systems. The implementation depends on whether the third- party RTU masters the corresponding protocol and whether the interface converters are available if necessary.

6,0$7,&3&6ZLWK6,0$7,&3&67HOH&RQWURO

Industrial Ethernet

IP-based

WAN

TIM

4R-IE

Classic

WAN

S7-400

S7-300

SINAUT ST7 stations

S5-115

S5-135/155

S5-100

 

SINAUT ST1 stations

 

G_PCS7_XX_00180

Integration of SINAUT ST1 stations into telecontrol communication

28Migration

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Contents Simatic PCS Totally Integrated Automation Totally Integrated AutomationContents Simatic PCS 7 TeleControl Process control system with integral telecontrol centerAutomation of widely spread process plants Simatic PCS 7 TeleControlOil and gas industries Typical application areasWater industry Simatic PCS 7 TeleControl system architecture System overviewIntegration in process control Engineering Communication with the outstations remote terminal unitsSimatic S7-300/S7-300F controllers Outstations remote terminal unitsSimatic S7-400/S7-400F controllers Spectrum of outstations and integration versions Topologies Basic topologiesMedia versions Combinations of basic topologies and media versionsSimatic PCS 7 TeleControl system components PCS 7 TeleControl Operator SystemSingle-user and multi-user systems Dual-channel operationLong-term archiving and logging Data Base Automation DBA PCS 7 TeleControl engineering stationSimatic PCS 7 TeleControl blocks Remote terminal units Possible tele Information pointsRTU Medium Simatic S7-300/S7-300F controller RTU Large Simatic S7-400/S7-400F controllerTelecontrol protocols General/elementary telecontrol functionsSinaut ST7 telecontrol protocol Sinaut ST7 telecontrol protocolClassic WAN media Range without repeaters exampleTCP/IP-based WAN media Redundant transmission pathSpecial characteristics Sinaut ST7 communication Technological configuration with Simatic water libraryOperating modes DNP3 telecontrol protocol 20 DNP3 telecontrol protocolDNP3 telecontrol protocol ScalanceSpecial characteristics of DNP3 communication 22 DNP3 telecontrol protocolIEC 870-5-101/IEC 870-5-104 telecontrol protocol IEC 870-5-101/IEC 870-5-104 telecontrol protocolClassic WAN media IEC 870-5-101 telecontrol protocol TCP/IP-based WAN media IEC 870-5-104 telecontrol protocolRTU ET 200S Modbus telecontrol protocol Modbus telecontrol protocolIncreasing the plant availability RedundancyRedundancy Migration Migration of existing telecontrol systemsUnits with Modbus communication Third-party stationsSinaut LSX systems Integration of third-party stations with OPCLinking of Siprotec or third-party protection equipment Application examples Uniform automation of all stations in the gas networkHigh system availability resulting from redundancy Application examplesReporting and archiving in compliance with Cost-effective RTUs exactly matched to the respective unitAdditional information