Which data types in the IEC 60870-5-104 protocol correspond to which ADSU types?

Singlepoint

0/1

Only digital data points can be mapped. If an analogue data point is mapped, the result is 0, if the analogue data point has the value 0; otherwise, the result is always 1.

1 M_SP_NA_1
30 M_SP_TB_1
45 C_SC_NA_1
58 C_SC_TA_1

Doublepoint

0..3

Unsigned integer values can be mapped here. Integer values that exceed the value range are interpreted as 3 (undefined).

3 M_DP_NA_1
31 M_DP_TB_1
46 C_DC_NA_1
47 C_RC_NA_1

Scaled value

-32768..32767

Unsigned and signed integer values (16 bit) can be mapped here.

11 M_ME_NB_1
35 M_ME_TE_1
49 C_SE_NB_1
62 C_SE_TB_1

Normalized value

-1.0000..0.9999

Float and double values within the value range permitted by the standard can be mapped here. Value range violations will not be handled.

9 M_ME_NA_1
34 M_ME_TD_1
61 C_SE_TA_1

Short value

Float 16

Float and double values can be mapped here (a possible conversion will not affect the value, but only the accuracy of the value).

13 M_ME_NC_1
36 M_ME_TF_1
50 C_SE_NC_1

Protection event

0..3

Unsigned integer values can be mapped here. Integer values that exceed the value range are interpreted as 3 (undefined).

38 M_EP_TD_1