Siemens SINUMERIK 840DE sl Commissioning Manual page 956

Functionality
5.3 Variable access
Access is performed as follows:
ABC[0,0] → /NC/_N_CH_GD3_ACX/ABC[u1, 1]
ABC[0.1] → /NC/_N_CH_GD3_ACX/ABC[u1, 2]
ABC[0.2] → /NC/_N_CH_GD3_ACX/ABC[u1, 3]
ABC[1.0] → /NC/_N_CH_GD3_ACX/ABC[u1, 4]
ABC[1.1] → /NC/_N_CH_GD3_ACX/ABC[u1, 5]
ABC[1.2] → /NC/_N_CH_GD3_ACX/ABC[u1, 6]
ABC[2.0] → /NC/_N_CH_GD3_ACX/ABC[u1, 7]
ABC[2.1] → /NC/_N_CH_GD3_ACX/ABC[u1, 8]
ABC[2.2] → /NC/_N_CH_GD3_ACX/ABC[u1, 9]
5.3.3 Variable paths for PLC access operations
PLC variables can be found in the OPC UA server under the "/Sinumerik/PLC" node.
In the address space of the NC, the displayed variables represent the access format that has
to be extended accordingly.
Example
Syntax of the PLC variable is as follows: "/Plc/MB"
This variable must be extended by the appropriate byte number, e.g. to "/Plc/MB6". Only then
a value is supplied.
Note
On SINUMERIK 828D, you can only access the freely definable customer data blocks as from
DB9000.
Access formats
The various access formats are shown in the following table. These must have the prefix "/Plc"
added to them.
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 5-2 PLC syntax
Area
Output image
Output image
Output image
40
Address (IEC)
Qx.y
QBx
QWx
Permissible data types
BOOL
BYTE, CHAR,
STRING
WORD, CHAR,
INT,
SINUMERIK Integrate for Engineering Access MyMachine / OPC UA
Configuration Manual, 12/2017, 6FC5397-1DP40-6BA1
OPC UA data type
Boolean
UInt32
String
UInt32
Int32