Advantages and disadvantages of PLC

PLC called a programmable logic controller, it has specially designed computer to operate in an industrial environment, which can operate in a wide range of temperature and humidity. Here this post gives a lot of advantages and disadvantages of PLC to better understood this topic. 

Advantages of PLC:
  • Rugged and designed to withstand vibrations, temperature, humidity and noise
  • PLC has a lot of contacts and low cost and safe
  • It has a very faster scan time, it has a fast operating time
  • A wide range of control application
  • It has capable to communicate with a computer in the plant
  • It has great computational capabilities 
  • It has shorter training time required
  • It has a small physical size
  • It has project cost can be accurately calculated
  • It has supervisory control capability
  • PLCs are easily programmed and it was relatively easily understood programming language
  • Have interfacing for input and output already inside the controller
  • One single programmable logic controller can easily run many machines so it is flexible
  • It has high-speed counters
  • It has shorter project implementation time
  • Troubleshooting in programming and reprogramming
  • The documentation was easy to do
  • It has a high level of reliability and low maintenance
  • Security in terms of programming
  • Adaptive to changes in production

Disadvantages of PLC:
  • There is too much work required in connecting wires
  • It has fixed circuit operation
  • PLCs manufacturers offer only closed-loop architecture
  • PLC is new technology so that should require training
  • There is a limitation of working of PLCs under high temperature, vibrations conditions
  • Some PLCs turn on when power is restored and may cause an accident
  • There is a difficulty with changes or replacement
  • Need extra security equipment such as really
  • Some application that performs a single function is not efficient in the use of PLC
  • Limited usage environment high temperature and harsh vibration can disrupt electronics equipment on the PLC
  • PLC is not considered necessary when it has applied to industrial systems that do not need to change the wiring
  • PLC is designed by semiconductor, which depends on the thermal characteristics
  • It is always difficult to find an error and require a skillful workforce
  • When uses PLC, a problem occurs hold up time is indefinite usually long
  • Number of operational modules must be added to maximize flexibility and performance
  • PLCs are propitiatory, meaning that the software and the use of parts can't be easily used by one manufacturer in combination with some uses by another manufacturer