Answer / uncontrol

Following are the mode of control. Ratio Control, PID
Control, PI Control, ON/OFF Control, Cascade Control,
Override Control, Feedback Control, Feed Froward Control.
These control are can be set in to MAN and AUTO Mode, If
this in MANUAL the mode of control is disable, If this is in
AUTO the mode of control is enable.

Answer / omak

In automatic controller there are two modes available to control the process. One is called Automatic mode, it will control the process automatically by comparing the feedback input with the set point. The another method called Manual mode, in this mode the operater check the measured input from the field and give the command manually for the final control element.

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