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MODBUS TCP server
6.
About this section
6.1.
This section provides reference information about the following issues:
•
IEC 61850 data modeling
•
Attributes
•
Status codes
IEC 61850 data modeling
6.2.
General information about IEC 61850 data modeling
6.2.1.
The relationship between the IEC 61850 data modeling and Modbus OPC Server is
described in this section.
For each data class, there is a table giving a detailed description about the relation between
the Modbus data and IEC 61850 data object attributes and services. The tables also
describe how the data is presented on the OPC Server name space.
The columns in the tables have the following content types:
•
Name specifies the OPC item name of the attribute/service.
•
Type specifies the IEC 61850 type of the attribute.
•
Value/ Value range specifies the allowed values and ranges of the attribute/service.
•
Mandatory/Optional specifies whether the attribute is considered as mandatory or
optional according to the IEC 61850 standard.
•
OPC data types specify the OPC data type used for the OPC item.
Data objects for status information
6.2.2.
Single point status (SPS)
6.2.2.1.
Table 6.2.2.1-1 Single point status (SPS) information
OPC data types
Protocol informa-
tion element
Mandatory
/Optional
Value/ Value
range
Type
Name
VT_BOOL
0x, 1x, 3x, 4x
M
TRUE | FALSE
BOOLEAN
stVal
VT_I4
generated by OPC
Server
M
Quality
q
VT_DATE
generated by OPC
Server
M
TimeStamp
t
115
COM600 series 5.0
1MRS758690
Master Protocols (Ethernet) and Applications Technical Refer-
ence Manual
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