
Lower hardware cost, standard computer hardware is less expensive than PLC hardware.

More flexibility & connectivity options as computer hardware is more extensible and up gradable than standard PLC systems.

Unlimited software abilities, computer software systems can be programmed to perform any functions and can be reused in different applications.

Easier and less expensive to maintain & upgrade. It is very easy to replace parts and upgrade components in computer hardware than PLC hardware.

Software controlled systems relies on computer hardware platforms which has far more storage and higher performance than PLC hardware.

Better user interface & graphical presentation of operations. It's always better to display data on computer screens than limited display panels of PLC's.