Archive for June, 2014

Supervisory Control

Monday, June 30th, 2014

The data collected in field are transferred and are available in a place centered. In this way they can be indicated, be registered, totalized, analyzed and alarmed. Beyond these characteristics she is necessary, also, that the operator of the system can to act in the process binding and disconnect motor and bombs, opening and closing motorized valves. Into this stage the digital signals of the system of acquisition of data are converted into analogical and applied signals some type of actuator of the process. So that everything this is carried through is necessary digital equipment that takes care of to these definitive tasks.

Such equipment associates the applicatory programs is called Supervisory Control and Acquisition of Dados (SCADA). The hardware (Equipment) the system of acquisition of data and supervisory control uses the computer as operation platform. By means of configurations in the screens it is possible that the different operator has vision of the process. Vision this that can be of an isolated mesh or the complete process (overview). The screen of the computer has for objective to substitute the conventional panels with botoeiras, visual pointers, annunciator of alarms. The keys bind and disconnect are substituted by keyboard keys or represented logical keys by means of graphical images in screens, and function as real keys. The display instruments also can be substituted by indications in the screen. The operator has the possibility to visualize the mesurada 0 variable to the side of the image of the associated equipment.

For example, the value of the outflow for one determined tubing can have its associated instantaneous value to the tubing. By means of configurations the virtual instruments can be looked like the conventional instruments (analogical, graphical graduation of bars). The pointers of alarms are substituted by alarms listed in the computer, being able still to exist the possibility of sonorous signal. Each category of alarm can assume different colors.