ABB COM600 3.4 User Manual page 71

1MRS755382 Station Automation COM600 3.4
IEC 60870-5-101 Slave (OPC) User's Manual
230 Maximum length L (number of octets)
The maximum frame length per Controlled Station can be up to 255.
Application layer
Transmission mode for application data
Mode 1 (The least significant octet first), as defined in clause 4.10 of IEC 870-5-4, is
used exclusively in this companion standard
Common address of ASDU (system-specific parameter)
One octet
Information object address (system-specific parameter)
One octet
Two octets
Three octets
Cause of transmission (system-specific parameter)
One octet
Selection of standard ASDUs
Process information in monitor direction (station-specific parameter)
<1> :=Single-point information
<2> :=Single-point information with time tag
<3> :=Double-point information
<4> :=Double-point information with time tag
<5> :=Step position information
<6> :=Step position information with time tag
<7> :=Bitstring of 32 bit
<8> :=Bitstring of 32 bit with time tag
<9> :=Measured value, normalized value
<10> :=Measured value, normalized value
with time tag
Unstructured
Two octets
structured
unstructured
Two octets (with originator address)
M_SP_NA_1
M_SP_TA_1
M_DP_NA_1
M_DP_TA_1
M_ST_NA_1
M_ST_TA_1
M_BO_NA_1
M_BO_TA_1
M_ME_NA_1
M_ME_TA_1
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