A variable frequency drive is a type of adjustable speed drive used in micro-mechanical drive system to control AC motor speed and torque by using motor input frequency and voltage.
Using Adaptive programming to customize the operation of drive in case the drive parameter setting is not sufficient. The adaptive programming is built with standard function blocks included in the drive firm wave.

• A predefined list of i/p for getting information.
• A predefined list of o/p for defines parameters.
• A collection of states in which each state has its own block program, inducing i/p, o/p and state transition elements.