The three ways to control a VFD from a PLC: discrete I/O, an analog speed signal, or a network. Wiring, drive settings and tips for each.
What Safe Torque Off means on a drive, how it differs from an E-stop or lockout, stop categories, and typical STO wiring.
Why drives trip on overvoltage when stopping, how a braking resistor fixes it, the alternatives, and a worked sizing example.
What the most common VFD fault trips mean, what usually causes them, and how to fix them, from overvoltage on deceleration to overcurrent on start.
A VFD controls motor speed by changing the frequency and voltage it supplies. The three stages inside a drive, why it saves energy, and what it means for your motor.
Size a variable frequency drive by motor current, load type, supply and environment. Includes a worked example and a sizing checklist.
Yes, a VFD can turn single-phase power into three-phase for a motor. What you need, how to size it, wiring basics and the mistakes to avoid.
How to decode a Unitronics UMI drive part number and choose between the B1, B5, and B7 series.
