Siemens SINUMERIK 840D Function Manual page 5

Information on the structure and contents
Structure
This Function Manual is structured as follows:
● Inner title (page 3) with the title of the Function Manual, the SINUMERIK controls as well as
the software and the version for which this version of the Function Manual is applicable and
the overview of the individual functional descriptions.
● Description of the functions in alphabetical order (e.g. A2, A3, B1, etc.)
● Appendix with:
– List of abbreviations
– Documentation overview
● Index of terms
Note
For detailed descriptions of data and alarms see:
● For machine and setting data:
Detailed machine data description
● For NC/PLC interface signals:
NC Variables and Interface Signals List Manual
● For alarms:
Diagnostics Manual
Notation of system data
The following notation is applicable for system data in this documentation:
Signal/Data Notation
NC/PLC interface ... NC/PLC interface signal:
signals
<signal address> (<signal name>)
Machine data ... machine data:
<Type><Number> <Complete Des‐
ignator> (<Meaning>)
Setting data ... setting data:
<Type><Number> <Complete Des‐
ignator> (<Meaning>)
Axes and spindles
Function Manual, 06/2019, A5E47437747B AA
Example
When the new gear stage is engaged, the following NC/PLC
interface signals are set by the PLC program:
DB31, ... DBX16.0-2 (actual gear stage A to C)
DB31, ... DBX16.3 (gear is changed)
Master spindle is the spindle stored in the machine data:
MD20090 $MC_SPIND_DEF_MASTER_SPIND (position of de‐
letion of the master spindle in the channel)
The logical master spindle is contained in the setting data:
SD42800 $SC_SPIND_ASSIGN_TAB[0] (spindle number con‐
verter)
Preface
5