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The Simatic PCS 7 process control system from Siemens Industry Automation Division now comes with telecontrol functions. Simatic PCS 7 TeleControl connects distant substations to the central control system by means such that there is no difference between the local or remote station as far as the plant operator is concerned.
Communication is over dedicated lines, dial-up lines or radio systems and, in new plants, TCP/IP-based techniques, with either DSL or GPRS. Simatic PCS 7 Telecontrol supports the Sinaut ST7 and Modbus protocols over serial as well as over TCP/IP-supported communication links. The ST7 telecontrol protocol allows data to be buffered in distant substations to bridge faults or sporadic connection interruptions in radio networks without losing important data.
Applications of Simatic PCS 7 TeleControl include compressors, pressure reduction, transfer and metering stations in gas supply networks; pumps and valve stations in oil pipelines; and sprinkler, pump and valve stations in water supply networks.
