7.3 Definition and presentation of the specific ASDUs
7.3.2 ASDUs for process information in control direction
Single command
Single information object (SQ = 0)
TYPE IDENTIFICATION
VARIABLE STRUCTURE QUALIFIER Defined in 7.2.3 CAUSE OF TRANSMISSION
Defined in 7.2.4 COMMON ADDRESS OF ASDU
DATA UNIT IDENTIFIER
Defined in 7.1
0 0 1 0 1 1 0 1
Defined in 7.2.5
S/E
INFORMATION OBJECT ADDRESS
INFORMATION
OBJECT
SCO = Single command, defined in 7.2.6.15 QU
0 0 0 0 0 0 0 1
0 SCS
IEC 148/03
Figure 64 – ASDU: C_SC_NA_1 Single command C_SC_NA_1 := CP{Data unit identifier,Information object address,SCO}
CAUSES OF TRANSMISSION used with TYPE IDENT 45 := C_SC_NA_1 CAUSE OF TRANSMISSION in control direction:
<6> := activation
<8> := deactivation in monitor direction:
<7> := activation confirmation
<9> := deactivation confirmation
<10> := activation termination
<44> := unknown type identification
<45> := unknown cause of transmission
<46> := unknown common address of ASDU
<47> := unknown information object address
7.3.2.2 TYPE IDENT 46: C_DC_NA_1 Double command
Single information object (SQ = 0)
TYPE IDENTIFICATION
VARIABLE STRUCTURE QUALIFIER Defined in 7.2.3 CAUSE OF TRANSMISSION
Defined in 7.2.4 COMMON ADDRESS OF ASDU
DATA UNIT IDENTIFIER
Defined in 7.1
0 0 1 0 1 1 1 0
INFORMATION OBJECT ADDRESS
INFORMATION
OBJECT
DCO = Double command, defined in 7.2.6.16
0 0 0 0 0 0 0 1
Defined in 7.2.5
S/E QU DCS
IEC 149/03
Figure 65 – ASDU: C_DC_NA_1 Double command
LICENSED TO MECON Limited. - RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY, SUPPLIED BY BOOK SUPPLY BUREAU.
C_DC_NA_1 := CP{Data unit identifier,Information object address,DCO}
CAUSES OF TRANSMISSION used with TYPE IDENT 46 := C_DC_NA_1 CAUSE OF TRANSMISSION in control direction:
<6> := activation
<8> := deactivation in monitor direction:
<7> := activation confirmation
<9> := deactivation confirmation
<10> := activation termination
<44> := unknown type identification
<45> := unknown cause of transmission
<46> := unknown common address of ASDU
<47> := unknown information object address
7.3.2.3 TYPE IDENT 47: C_RC_NA_1 Regulating step command Single information object (SQ = 0)
TYPE IDENTIFICATION
VARIABLE STRUCTURE QUALIFIER Defined in 7.2.3 CAUSE OF TRANSMISSION
Defined in 7.2.4 COMMON ADDRESS OF ASDU
DATA UNIT IDENTIFIER
Defined in 7.1
0 0 1 0 1 1 1 1
INFORMATION OBJECT ADDRESS
INFORMATION
OBJECT
RCO = Regulating step command, defined in 7.2.6.17
0 0 0 0 0 0 0 1
Defined in 7.2.5
S/E QU RCS
IEC 150/03
Figure 66 – ASDU: C_RC_NA_1 Regulating step command C_RC_NA_1 := CP{Data unit identifier,Information object address,RCO}
CAUSES OF TRANSMISSION used with TYPE IDENT 47 := C_RC_NA_1 CAUSE OF TRANSMISSION in control direction:
<6> := activation
<8> := deactivation in monitor direction:
<7> := activation confirmation
<9> := deactivation confirmation
<10> := activation termination
<44> := unknown type identification
<45> := unknown cause of transmission
<46> := unknown common address of ASDU
<47> := unknown information object address
LICENSED TO MECON Limited. - RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY, SUPPLIED BY BOOK SUPPLY BUREAU.
7.3.2.4 TYPE IDENT 48: C_SE_NA_1
Set-point command, normalized value Single information object (SQ = 0)
TYPE IDENTIFICATION
VARIABLE STRUCTURE QUALIFIER Defined in 7.2.3 CAUSE OF TRANSMISSION
Defined in 7.2.4 COMMON ADDRESS OF ASDU
DATA UNIT IDENTIFIER
Defined in 7.1
0 0 1 1 0 0 0 0
Defined in 7.2.5 INFORMATION OBJECT ADDRESS
INFORMATION OBJECT
NVA = Normalized value, defined in 7.2.6.6
QOS = Qualifier of set-point command, defined in 7.2.6.39 S/E
Figure 67 – ASDU: C_SE_NA_1 Set-point command, normalized value C_SE_NA_1 := CP{Data unit identifier,Information object address,NVA,QOS}
CAUSES OF TRANSMISSION used with TYPE IDENT 48 := C_SE_NA_1 CAUSE OF TRANSMISSION in control direction:
<6> := activation
<8> := deactivation in monitor direction:
<7> := activation confirmation
<9> := deactivation confirmation
<10> := activation termination (opt)
<44> := unknown type identification
<45> := unknown cause of transmission
<46> := unknown common address of ASDU
<47> := unknown information object address
7.3.2.5 TYPE IDENT 49: C_SE_NB_1 Set-point command, scaled value Single information object (SQ = 0)
TYPE IDENTIFICATION
VARIABLE STRUCTURE QUALIFIER Defined in 7.2.3 CAUSE OF TRANSMISSION
Defined in 7.2.4 COMMON ADDRESS OF ASDU
DATA UNIT IDENTIFIER
Defined in 7.1
0 0 1 1 0 0 0 1
Defined in 7.2.5 INFORMATION OBJECT ADDRESS
INFORMATION OBJECT
SVA = Scaled value, defined in 7.2.6.7
QOS = Qualifier of set-point command, defined in 7.2.6.39 S/E
Figure 68 – ASDU: C_SE_NB_1 Set-point command, scaled value
LICENSED TO MECON Limited. - RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY, SUPPLIED BY BOOK SUPPLY BUREAU.
C_SE_NB_1 := CP{Data unit identifier,Information object address,SVA,QOS}
CAUSES OF TRANSMISSION used with TYPE IDENT 49 := C_SE_NB_1 CAUSE OF TRANSMISSION in control direction:
<6> := activation
<8> := deactivation in monitor direction:
<7> := activation confirmation
<9> := deactivation confirmation
<10> := activation termination (opt)
<44> := unknown type identification
<45> := unknown cause of transmission
<46> := unknown common address of ASDU
<47> := unknown information object address
7.3.2.6 TYPE IDENT 50: C_SE_NC_1
Set-point command, short floating point number Single information object (SQ = 0)
TYPE IDENTIFICATION
VARIABLE STRUCTURE QUALIFIER Defined in 7.2.3 CAUSE OF TRANSMISSION
Defined in 7.2.4 COMMON ADDRESS OF ASDU
DATA UNIT IDENTIFIER
Defined in 7.1
0 0 1 1 0 0 1 0
0
INFORMATION OBJECT ADDRESS
INFORMATION OBJECT
IEEE STD 754 = Short floating point number, defined in 7.2.6.8 Defined in 7.2.5
Fraction
QOS = Qualifier of set-point command, defined in 7.2.6.39
S/E QL
IEC 153/03
Figure 69 – ASDU: C_SE_NC_1 Set-point command, short floating point number C_SE_NC_1 := CP{Data unit identifier,Information object address,IEEE STD 754,QOS}
CAUSES OF TRANSMISSION used with TYPE IDENT 50 := C_SE_NC_1 CAUSE OF TRANSMISSION in control direction:
<6> := activation
<8> := deactivation in monitor direction:
<7> := activation confirmation
<9> := deactivation confirmation
<10> := activation termination (opt)
<44> := unknown type identification
<45> := unknown cause of transmission
<46> := unknown common address of ASDU
<47> := unknown information object address
LICENSED TO MECON Limited. - RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY, SUPPLIED BY BOOK SUPPLY BUREAU.
7.3.2.7 TYPE IDENT 51: C_BO_NA_1 Bitstring of 32 bit
Single information object (SQ = 0)
TYPE IDENTIFICATION
VARIABLE STRUCTURE QUALIFIER Defined in 7.2.3 CAUSE OF TRANSMISSION
Defined in 7.2.4 COMMON ADDRESS OF ASDU
DATA UNIT IDENTIFIER
Defined in 7.1
0 0 1 1 0 0 1 1
Defined in 7.2.5 INFORMATION OBJECT ADDRESS
INFORMATION OBJECT
BSI = Binary state information, 32 bit, defined in 7.2.6.13 Bitstring
Bitstring Bitstring Bitstring
0 0 0 0 0 0 0 1
IEC 154/03
Figure 70 – ASDU: C_BO_NA_1 Bitstring of 32 bit C_BO_NA_1 := CP{Data unit identifier,Information object address,BSI}
CAUSES OF TRANSMISSION used with TYPE IDENT 51 := C_BO_NA_1 CAUSE OF TRANSMISSION in control direction:
<6> := activation
<8> := deactivation in monitor direction:
<7> := activation confirmation
<9> := deactivation confirmation
<10> := activation termination (opt)
<44> := unknown type identification
<45> := unknown cause of transmission
<46> := unknown common address of ASDU
<47> := unknown information object address
LICENSED TO MECON Limited. - RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY, SUPPLIED BY BOOK SUPPLY BUREAU.
7.3.3 ASDUs for system information in monitor direction