Siemens SINUMERIK 828D Commissioning Manual page 923

Area
Bit memory
Bit memory
Counters
timers
Notes regarding the table:
● In the table, "x" stands for the byte offset in the area; "y" for the bit number in the byte; and
"z" for the data block.
● The bold data type is the default data type in each case and does not have to be specified
when addressing. In addition, the specifications DB2.DBB5.BYTE and DB2.DBB5 are
equivalent, for example.
● Square brackets are used to access arrays, e.g. "/Plc/DB5.DBW2:[10]" (word array of length
10).
Examples of variable paths (PLC access operations)
Table 4-4
Variable path
/Plc/M5.0
/Plc/DB5.DBW2
/Random/Plc/
DB8.DBB2:STRING
/Plc/DB8.DBW2:[10]
/Plc/DB100.DBB1
/Random/Plc/
DB2.DBD0:REAL[10]
SINUMERIK Integrate for Engineering Access MyMachine / OPC UA
Commissioning Manual, 10/2015, 6FC5397-3DP40-5BA3
Address (IEC)
MWx
MDx
Cx
Tx
Examples of variable paths (PLC access operations)
Description
Memory bit 0 at byte offset 5
Word (16-bit) at byte offset 2 in data block 5
UTF8 string beginning at byte offset 2 in data block 8
Array of 10 words beginning at byte offset 2 in data block 8
Byte at byte offset 1 in data block 100
Array of 10 double words (32-bit) beginning at byte offset 0 in data block
2, which are formatted as a floating-point number
OPC UA Data Access - functional scope
Permissible data types
WORD, CHAR,
INT
DWORD,
DINT,
REAL
-
-
4.3 Variable paths
OPC UA data type
UInt32
Int32
UInt32
Int32
Double
Byte
UInt32
31