Cotmac Electronics PLC Programmer Interview Questions and Answers

A transformer is an electrical device that transfers electrical energy between two or more circuits through electromagnetic induction.

• Consists of two coils of wire (primary and secondary) wrapped around a core

• Primary coil receives electrical input and creates a magnetic field

• Magnetic field induces a voltage in the secondary coil, transferring energy

• Used in power distribution, voltage regulation, and isolation

• Examples: ...read more

PLC is used for discrete control, DCS is used for process control

• PLC is typically used for discrete control applications, such as manufacturing assembly lines

• DCS is typically used for process control applications, such as chemical plants or power plants

• PLC is more modular and can be easily expanded or modified

• DCS is more centralized and allows for better coordination of multiple control loops

• PLC programming is usually ...read more

SCADA stands for Supervisory Control and Data Acquisition, used for monitoring and controlling industrial processes.

• SCADA systems are used in industries such as power plants, water treatment facilities, and manufacturing plants.

• They collect data from sensors and equipment, display it in a graphical interface, and allow operators to control the processes remotely.

• SCADA systems help improve efficiency, reduce downtime, a