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SCADA
Applications - Oil & Gas
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Bentek Systems provided the systems
and detail design engineering of a wide area SCADA communications system for monitoring
over150 variable frequency drive (VFD) driven pumps. This system illustrates how the SCADALink 900-MB can be used to implement a wide area license-free point-multipoint oilfield SCADA communication system. The SCADA master computer communicated with 15 remote PAD sites using 900-MB's. At each remote PAD, a network of multidropped VFD's was connected to the 900-MB's RS-485 interface, enabling Modbus communciations between the SCADA host and each of the multidropped VFD's. The 900-MB also provided an address translation scheme to allow up to 248 VFD's to coexist on the same network. Because of the distance and location of some of the remote SCADA sites, two repeaters were required to improve the communications path. The repeaters were implemented using back-to-back 900-MB's configured for different frequency hop codes for isolation.
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