Keypad Adjustable Frequency Controls are used with what control method?

Keypad Adjustable Frequency Controls are used with what control method?

• A. Cab mounted controls
• B. Hanging pendant controls
• C. Walkabout remote controls
• D. All of the above

Answer: (D)

Keypad adjustable frequency controls are an interface to the variable frequency drive that powers the crane’s motors. By entering a frequency, the operator determines the motor speed and how quickly the crane can start, accelerate, and stop. This interface isn’t tied to a single mounting location; the same keypad-driven settings can be accessed whether the control system is in the cab, on a hanging pendant, or on a walkabout remote. Because the drive settings are accessible across these different control methods, keypad adjustable frequency controls work with all of them. In practice, that’s why the all-of-the-above option is correct.

Keypad adjustable frequency controls are an interface to the variable frequency drive that powers the crane’s motors. By entering a frequency, the operator determines the motor speed and how quickly the crane can start, accelerate, and stop. This interface isn’t tied to a single mounting location; the same keypad-driven settings can be accessed whether the control system is in the cab, on a hanging pendant, or on a walkabout remote. Because the drive settings are accessible across these different control methods, keypad adjustable frequency controls work with all of them. In practice, that’s why the all-of-the-above option is correct.