Siemens SINUMERIK 828D Commissioning Manual page 922

OPC UA Data Access - functional scope
4.3 Variable paths
In the address space of the NC, the displayed variables represent the access format that has
to be extended accordingly.
Example
The variable "/Plc/MB" is in the address space. This variable must be extended by the
appropriate byte number, e.g. to "/Plc/MB6". Only then is a value supplied.
Access formats
The various access formats are shown in the following table. When the default data type (bold
format) is used, you must expand it by the prefix "/Plc". For all others, it must be expanded by
the prefix "/Random/Plc".
Note
The data type is converted during access with the OPC UA data access interface. Refer to the
following table for the data type conversions.
Table 4-3
Area
Output image
Output image
Output image
Output image
Data block
Data block
Data block
Data block
Input image
Input image
Input image
Input image
Bit memory
Bit memory
30
PLC syntax
Address (IEC)
Qx.y
QBx
QWx
QDx
DBz.DBXx.y
DBz.DBBx
DBz.DBWx
DBz.DBDx
Ix.y
IBx
IWx
IDx
Mx.y
MBx
Permissible data types
BOOL
BYTE, CHAR,
STRING
WORD, CHAR,
INT,
DWORD,
DINT,
REAL
BOOL
BYTE, CHAR,
STRING
WORD, CHAR,
INT
DWORD,
DINT,
REAL
BOOL
BYTE, CHAR,
STRING
WORD, CHAR,
INT
DWORD,
DINT,
REAL
BOOL
BYTE, CHAR,
STRING
SINUMERIK Integrate for Engineering Access MyMachine / OPC UA
Commissioning Manual, 10/2015, 6FC5397-3DP40-5BA3
OPC UA data type
Boolean
UInt32
String
UInt32
Int32
UInt32
Int32
Double
Boolean
UInt32
String
UInt32
Int32
UInt32
Int32
Double
Boolean
UInt32
String
UInt32
Int32
UInt32
Int32
Double
Boolean
UInt32
String