Cause : Units changeover: Calculation parameter values after reference value change unsuccessful.The change of a reference parameter meant that for an involved parameter the selected value was not able to be re-calculated in the per unit representation.

The change was rejected and the original parameter value restored. Fault value (r0949, parameter):
Parameter whose value was not able to be re-calculated.

See also: p0596 (Reference quantity, technological units), p2000 (Reference speed), p2001 (Reference voltage),
p2002 (Reference current), p2003 (Reference torque), r2004 (Reference power)