13.7.2. Tag

The data types supported in IEC 60870-5-104 are Single-point information (M_SP_NA), Double-point information (M_DP_NA), Measured value-normalised value (M_ME_NA), Measured value-scaled value (M_ME_NB), Measured value-short floating point value (M_ME_NC), Integrated totals (M_IT_NA), Single-point information with time tag (M_SP_TB), Double-point information with time tag (M_DP_TB), Measured value-normalised value with time tag (M_ME_TD), Measured value-scaled value with time tag (M_ME_TE), Measured value-short floating point value with time tag (M_ME_TF), Integrated totals with time tag (M_IT_TB), Single-command (C_SC_NA), Double-command (C_DC_NA), Set point command-normalised value (C_SE_NA), Set point command-scaled value (C_SE_NB), and Set point command-short floating point value (C_SE_NC).

For control ASDUs, there are two more attributes, Qualifier and Select Before Execute. Qualifier is for the digital output. Select Before Execute writes tag with dual select-before-execute command.

IEC 60870-5-104 Tag Configuration

The IntegraXor tag data type must be matched with the IEC 60870-5-104 data type according to the following table.

IEC 60870-5-104 data type

IntegraXor tag data type

M_SP_NA

boolean

M_DP_NA

int8

M_ME_NA

int16

M_ME_NB

int16

M_ME_NC

real32

M_IT_NA

int16

M_SP_TB

boolean

M_DP_TB

int8

M_ME_TD

int16

M_ME_TE

int16

M_ME_TF

real32

M_IT_TB

int16

C_SC_NA

boolean

C_DC_NA

int8

C_SE_NA

real32

C_SE_NB

int16

C_SE_NC

real32

[Note] Note

Configure Input tag attribute to True for Read-Only input tag.