• The return value is unsigned 2 bytes wide value, the unit is 1 Hz, the resolution is 1 mHz, and the range is from 0.000 Hz to 65.534 Hz. Value 0xFFFF (i.e. 65.535 Hz) specifies a sensor error.
• FRC 2-byte: FRC return value is the mains frequency value +4 (i.e. 0xC354=50,004 is 50.000 Hz). Because of FRC predefined values the raw values from 0xFFFC to 0xFFFF (i.e. 65.532 Hz to 65.535 Hz) cannot be passed.