Mapping to IEC 60870-5-104 type identification

CP56Time2a	No timestamp		With timestamp
Data point type	Norm	Floating point	Norm	Floating point
Measured value	M_ME_NA_1	M_ME_NC_1	M_ME_TD_1	M_ME_TD_1
Set point command	C_SE_NA_1	C_SE_NC_1	C_SE_TA_1	C_SE_TC_1

CP56Time2a Data Point type	No timestamp	Parameters DP
	Timestamp	IA
single-point information (16)	Priority
double-point information	Priority
integrated totals	Group (none -> 4), Priority
measured value (16)	Type (float/norm), Priority *1)	Threshold, Normalizing
single command
double command
set point command	Threshold, Normalizing	Threshold, Normalizing