Aztec Process Automation Interview Questions and Answers

There are two types of PLC outputs: digital outputs and analog outputs.

• Digital outputs are used to control devices that have discrete on/off states, such as motors, solenoids, and lights.

• Analog outputs are used to control devices that require continuous variable control, such as variable speed drives and proportional valves.

DOL starter is a type of motor starter used to start and stop motors directly on line.

• DOL stands for Direct-On-Line.

• It is the simplest and most economical type of motor starter.

• It is used for small motors with low starting current.

• It provides full voltage to the motor during starting.

• It does not provide any protection against overloading or short circuits.

• It is commonly used in applications such as pumps, fans, and con