Supported ASDU types identification in protocols of the IEC 60870-5-104 and IEC 60870-5-101 standards

1. Process information in the monitoring direction

<1>

M_SP_NA

Single-point information

bool (0 – OFF, 1 – ON)

<2>

M_SP_TA

Single-point information (with time tag)

bool (0 – OFF, 1 – ON)

<3>

M_DP_NA

Double-point information

unsigned int8 (0 – Indeterminate or intermediate, 1 – OFF, 2 – ON, 3 – Indeterminate)

<4>

M_DP_TA

Double-point information (with time tag)

unsigned int8 (0 – Indeterminate or intermediate, 1 – OFF, 2 – ON, 3 – Indeterminate)

<5>

M_ST_NA

Step position information

int8 (-64 ... +64)

<6>

M_ST_TA

Step position information (with time tag)

int8 (-64 ... +64)

<7>

M_BO_NA

String of 32 bits

unsigned int32

<8>

M_BO_TA

String of 32 bits (with time tag)

unsigned int32

<9>

M_ME_NA

Measured value, normalized value

float

<10>

M_ME_TA

Measured value, normalized value (with time tag)

float

<11>

M_ME_NB

Measured value, scaled value

float

<12>

M_ME_TB

Measured value, scaled value (with time tag)

float

<13>

M_ME_NC

Measured value, short floating point number

float

<14>

M_ME_TC

Measured value, short floating point number (with time tag)

float

<15>

M_IT_NA

Integrated total

int32

<16>

M_IT_TA

Integrated total (with time tag)

int32

<17>

M_EP_TA

Event of protection equipment (with time tag)

unsigned int8 (0 – Indeterminate, 1 – OFF, 2 – ON, 3 – Indeterminate)

<18>

M_EP_TB

Packed start events of protection equipment (with time tag)

unsigned int8 (Set of bits in accordance with the standard)

<19>

M_EP_TC

Packed output circuit information of protection equipment (with time tag)

unsigned int8 (Set of bits in accordance with the standard)

<20>

M_PS_NA

Packed single-point information with status change detection

unsigned int16

<21>

M_ME_ND

Measured value, normalized value without quality descriptor

float

<30>

M_SP_TB

Single-point information (with time tag CP56Time2a)

bool (0 – OFF, 1 – ON)

<31>

M_DP_TB

Double-point information (with time tag CP56Time2a)

unsigned int8 (0 – Indeterminate or intermediate, 1 – OFF, 2 – ON, 3 – Indeterminate)

<32>

M_ST_TB

Step position information (with time tag CP56Time2a)

int8 (-64 ... +64)

<33>

M_BO_TB

String of 32 bits (with time tag CP56Time2a)

unsigned int32

<34>

M_ME_TD

Measured value, normalized value (with time tag CP56Time2a)

float

<35>

M_ME_TE

Measured value, scaled value (with time tag CP56Time2a)

float

<36>

M_ME_TF

Measured value, short floating point number (with time tag CP56Time2a)

float

<37>

M_IT_TB

Integrated totals (with time tag CP56Time2a)

int32

<38>

M_EP_TD

Event of protection equipment (with time tag CP56Time2a)

unsigned int8 (0 – Indeterminate, 1 – OFF, 2 – ON, 3 – Indeterminate)

<39>

M_EP_TE

Packed start events of protection equipment (with time tag CP56Time2a)

unsigned int8 (Set of bits in accordance with the standard)

<40>

M_EP_TF

Packed output circuit information of protection equipment (with time tag CP56Time2a)

unsigned int8 (Set of bits in accordance with the standard)

2. Process information in the control direction

<45>

C_SC_NA

Single command

bool (0 – OFF, 1 – ON)

<46>

C_DC_NA

Double command

unsigned int8 (0 – Unallowed, 1 – OFF, 2 – ON, 3 – Unallowed)

<47>

C_RC_NA

Regulating step command

unsigned int8 (0 – Unallowed, 1 – Next step UP, 2 – Next step DOWN, 3 – Unallowed)

<48>

C_SE_NA

Setpoint command, normalized value

float

<49>

C_SE_NB

Setpoint command, scaled value

float

<50>

C_SE_NC

Setpoint command, short floating point number

float

<51>

C_BO_NA

String of 32 bits

int32

<58>

C_SC_TA

Single command (with time tag CP56Time2a)

bool (0 – OFF, 1 – ON)

<59>

C_DC_TA

Double command (with time tag CP56Time2a)

unsigned int8 (0 – Unallowed, 1 – OFF, 2 – ON, 3 – Unallowed)

<60>

C_RC_TA

Regulating step command (with time tag CP56Time2a)

unsigned int8 (0 – Unallowed, 1 – Next step UP, 2 – Next step DOWN, 3 – Unallowed)

<61>

C_SE_TA

Setpoint command, normalized value (with time tag CP56Time2a)

float

<62>

C_SE_TB

Setpoint command, scaled value (with time tag CP56Time2a)

float

<63>

C_SE_TC

Setpoint command, short floating point number (with time tag CP56Time2a)

float

<64>

C_BO_TA

String of 32 bits (with time tag CP56Time2a)

int32

3. System information in the monitoring direction

<70>

M_EI_NA

End of initialization

END OF INITIALIZATION system command

4. System information in the control direction

<100>

C_IC_NA

Interrogation command

INTERROGATION system command

<101>

C_CI_NA

Counter interrogation command

COUNTER INTERROGATION system command

<102>

C_RD_NA

Read command

READ system command

<103>

C_CS_NA

Clock synchronization command

CLOCK SYNCHRONIZATION system command

<104>

C_TS_NA

Test command

TEST system command

<105>

C_RP_NA

Reset process command

RESET PROCESS ACTIVATION / RESET PROCESS CONFIRMATION system commands

<106>

C_CD_NA

Delay acquisition command

DELAY ACQUISITION system command

<107>

C_TS_TA

Test command (with time tag CP56Time2a)

TEST WITH TIME TAG system command

5. Parameters in the control direction

<110>

P_ME_NA

Parameter of measured value, normalized value

float

<111>

P_ME_NB

Parameter of measured value, scaled value

float

<112>

P_ME_NC

Parameter of measured value, short floating point number

float

<113>

P_AC_NA

Parameter activation

PARAMETER ACTIVATION system command

6. File transfer

<120>

F_FR_NA

File ready

Not processed

<121>

F_SR_NA

Section ready

Not processed

<122>

F_SC_NA

Call directory, select file, call file, call section

CALL DIRECTORY, SELECT FILE, CALL FILE, CALL SELECTION system command

<123>

F_LS_NA

Last section, last segment

Not processed

<124>

F_AF_NA

ACK file, ACK section

Not processed

<125>

F_SG_NA

Segment

Not processed

<126>

F_DR_TA

Directory

Not processed