Measurand object transmission is defined by the IEC 60870-5-103 standard. The standard does not define any method for transporting integer values like counters or enumeral objects.
Measurands are transmitted as a set of Class 2 data, referred to as a Class 2 measurands frame. According to the standard the coding of IEC 60870-5-103 measurand objects must be 13 bit signed values in the range of -1…+1.
When an IEC 60870-5-103 measurand, for example phase current, is scaled as 2.4, it means that the measurand value 1 corresponds to 2.4 × In, measurand value 0.5 corresponds to 1.2 × In, and so on. If the measurand value in this case exceeds 2.4 × In, the IEC 60870-5-103 object value saturates at its maximum value and an overflow flag is set in the IEC 60870-5-103 object transmission.