System Control and data acquisition, SCADA

Sophisticated computer-based data monitoring systems may be installed, with which preventive maintenance is planned by trend logging (This type of system is commonly referred to as a building management system (BMS), building automation system (BAS) or system control and data acquisition (SCADA) system.)... 

Four main units are used in the IMCS, which are the motor control unit (MCU), the feeder control unit (FCU), the circuit breaker control unit (CBCU) and the central control unit (CCU). A MCU is a microprocessor (micro-computer) based module which has integrated control, monitoring, protection functions, and a communication interface for the motor starter. An FCU is very similar to a MCU and interfaces communication for the plain feeder contactor or circuit breaker. A CBCU is also similar to a MCU but is used for incomers, interconnectors and busbar section circuit breakers. A CCU provides the facility to communicate simultaneously with MCUs, FCUs, CBCU, a distributed control system (DCS), system control and data acquisition (SCADA) and other digital information systems. Other discrete devices such as special protective relays can also be addressed by the CCU provided the software and porting systems are compatible. 

Along the corridor of the power line, a system control and data acquisition (SCADA) or instrumentation line is run back to the main control station. Telephone wires or fiber optics are used to monitor remote start or shut pumps and valves. The computer system that monitors the local control may be programmable local controller (PTC) based. The centralized control room is usually called the distributed control system (DCS). SCADA controlled systems are designed to include ... 

Plants with system control and data acquisition (SCADA) systems may adjust chemical dosage automatically. The SCADA system communicates the feed setting to the feed equipment to achieve the needed chemical dosage. These systems also offer manual feed equipment control to achieve needed dosage changes. In either case, the dosage is determined first, and then the equipment is adjusted to dehver the correct amount of chemical to match the volume of water being treated (fiow). 

---