Advantages and disadvantages of programmable logic controller (PLC)

There are some advantages of programmable logic controller (PLC) are given below,

• It has very faster scan time.
• It has capable to communication with computer in plant.
• It has great computational capabilities.
• It has shorter training time required.
• A wide range of control application.
• It Have interfacing for inputs and outputs already inside the controller.
• It is easily programmed and has an easily understood programming language.
• It has project cost can be accurately calculated.
• It has supervisory control capability.
• It has small physical size.
• It has flexibility in programming and reprogramming.
• Troubleshooting is easier and faster.
• It has high speed counters.
• It has shorter project implementation time.
• It has reliability in operation.

There are some disadvantages of programmable logic controller (PLC) are given below,

• When a problem occurs, hold-up time is indefinite, usually long.
• There are limitations of working of PLCs under high temperature, vibration conditions.
• some PLCs turns on when power is restored and may cause any accident.

programmable logic controller