The frequency measurement range is 35...75 Hz. The measured frequencies outside the measurement range are considered to be out of range and the minimum and maximum values are then shown in parentheses.
There is an extended range of 25...75 Hz in a 50 Hz network and 30...75 Hz in a 60 Hz network. The measured frequencies outside 25...75 in a 50Hz and 30...75 Hz in a 60 Hz are shown in parentheses.
When the frequencies cannot be measured, for example, due to too low voltage amplitude, the default value for frequency measurement can be selected with the Def frequency Sel setting parameter. In the “Nominal” mode the frequency is set to 50 Hz (or 60 Hz) and in “Zero” mode the frequency is set to zero and shown in parentheses.
FMMXU provides instantaneous frequency in hertz which is available via monitoring data F_INST.