FA173966
28 September 2021
Issue: Measured Mains Voltage does not match the Mains Voltage readings of HMI on ATV61/71
Product line: Altivar ATV61 and ATV71
Environment: All models, all serial numbers
Cause: Flat topping on the input AC waveform.
Resolution: The HMI's Mains Voltage reading is a calculation of the Mains Voltage, by reading the DC bus. It is calculated by taking the DC bus value and dividing it by the square root of 2.
