Information Systems

ADO.NET is data access technology it is evolution from DAO to RDO to ADO DAO- Data Access Objects RDO-Remote Data Object ADO-ActiveX Data Objects ADO.NET-Not an acronym ADO.NET Features •ADO.NET supports both connected and disconnected solution •It has tight integration with XML and .Net Framework •HTTP is used to transport XML between layers •ADO.NET is [...]

The control concept of control systems also applies to Thermal power.  In that way, there are certain ways in which the thermal power plant is to be controlled 1. Controlling the power generated First, the power generated needs to be controlled in MW (megawatt). It is not possible to store power. Therefore, the power depends [...]

With “Supervisory Control” primary loop control is returned to analog controllers, while computer monitors the process & adjusts the set points. Computer is relieved from computational tasks & can be utilized for process optimization & plant management In a Supervisory Control System, Analog control subsystem& panel instrumentation is used for controlling but it is interfaced [...]

To provide a safe shutdown of the system or tripping of equipment, when the operating constraints are violated. The requirements are availability and integrity. Dual redundant, triple redundant or quadruple redundant systems are available. Features like memory test, self test, functionality test are done routinely to test the integrity of the system Protection in power [...]

Power plants are controlled by control systems which provide a manual and automatic control of plant Maintain an adequate margin from safety and operational constraints – Control System Monitor these margins and plant conditions and provide immediate indications and records – Indications, Recording and historization Draw the attention of the operator by an Alarm System [...]

What is DCS ? Functionally and physically separate automatic process controllers, process monitoring and data logging equipment connected with each other to share relevant information for optimum plant control is called distribution control system How is DCS ? Microprocessor based DCS Systems are a form of DDC that divide data acquisition & control functions among [...]

Avionics It is science and technology of electronic systems and devices for aeronautics and astronautics The electronics used for piloting an aircraft are called avionics Avionics mainly consists of communications and navigation systems, Autopilots Flight management system(FMS) Navigation : Absolute Navigation Systems that measure the state vector without regard to the path traveled by the [...]

YEAR PRODUCT 1900-1908    : Manual control with gauge and valves 1938-1940     : Pneumatic signal and instruments 1950’s              : Electronic signal and instruments 1960’s              : Computer starts to be used.(1962: Introduction of direct digital control) 1968                 : PLC arrived on scene (G.M.USA) 1969                 : First PLC manufactured for automotive industry as electronic equivalent to [...]

Fire Panel It is the hardware that controls fire sensors and other peripherals Fire Panel Should Be able to sense fire. Have some means to alert the concerned person. Be ready to operate. Be easily maintainable Components Used Detector Detector is essentially a fire sensor. Conventional detector is a non-addressable detector whereas intelligent detector is [...]

Access control is devices which answers for the questions like who, when, where Control Cards Technology Magnetic Stripe Barcode Barium Ferrite Wiegand Proximity Keypads Card/Keypad Combos Biometrics Smart Cards Magnetic Stripe Four tracks An exposed read head is placed in the reader used to read the Cards Barcode Card is swept through a reader The [...]