Reading And Writing Plc Variables; Axis Actual Values And Distance-To-Go - Siemens SINUMERIK 808D Commissioning Manual

A.7.11.3

Reading and writing PLC variables

DB4900 PLC variables [r/w]
PLC interface
Byte Bit 7
0
...
4095
Note
The programming engineer (NCK and PLC) is responsible for organizing (structuring) this
memory area. Every storage position in the memory can be addressed provided that the limit
is selected according to the appropriate data format (i.e. a 'DWORD' for a 4-byte limit, a
WORD for a 2-byte limit, etc.). The memory area is always accessed with the information
about the data type and the position offset within the memory area.
A.7.12

Axis actual values and distance-to-go

DB5700 ... Signals from axis/spindle [r]
5704
NCK -> PLC interface
Byte Bit 7
0
4
Note
The axis actual values and distances-to-go can be separately requested:
• DB2600.DBX0001.1 Request axis actual values
• DB2600.DBX0001.2 Request axis distances-to-go
If the particular request is set, then the NCK supplies these values for all axes.
Commissioning Manual
Commissioning Manual, 01/2015, 6FC5397-4EP10-0BA0
Bit 6 Bit 5
Bit 6 Bit 5
Axis actual value (REAL)
Axis distance-to-go (REAL)
Bit 4 Bit 3
Offset [0]
...
Offset [4095]
Bit 4 Bit 3
A.7 PLC user interfaces
Bit 2 Bit 1
Bit 2 Bit 1
Appendix
Bit 0
Bit 0
131