Siemens Sinumerik 840D sl Programming Manual page 207

S7 configuration
"S7 configuration" is a tool for defining the parameters of modules. "S7 configuration" can be
used to set different -> parameter sets of the -> CPU and the I/O modules in the ->
programming device. These parameters are loaded to the CPU.
S7-300 bus
The S7-300 bus is a serial data bus that supplies the appropriate voltage to the modules,
and that is used by these modules for data interchange. The modules are interconnected via
plug-in bus connectors.
Safety functions
The control system has constantly active monitoring functions with which errors in the ->
CNC, the programmable control system (-> PLC) and the machine can be detected early
enough to avoid damages to the workpiece, tool or machine to a large extent. The machining
is interrupted and the drives are stopped when a fault or error occurs. The cause of the error
is recorded and an alarm is output. At the same time, the PLC is notified that a CNC alarm
has been triggered.
Safety Integrated
Effective protection according to the EU Guideline >>89/392/EEC<<, >>Safety Integrity
Level 3<< according to EN-954-1 (the B 1-4 classes are defined in this standard) for the
safety of operators and machine, integrated in the control system for safe installation and
testing.
Failure safety is guaranteed. This safety function is also effective during individual faults.
Scaling
Component of a -> frame through which axis-specific changes are made.
Set
All files that are required for the programming and execution of a program are denoted as
sets.
A section of a -> part program which ends with "LineFeed" (line break). A distinction is made
between -> main blocks and -> subblocks.
Setting data
Data that supplies information on the features of the machine to the control system; the
method is defined in the system software. Unlike -> machine data, setting data can be
modified by the user.
Softkey
A key whose name is displayed in one part of the screen. The selection of the softkeys that
are displayed is adjusted automatically to the relevant operating state. The freely
ISO Milling
Programming Manual, 06/09, 6FC5398-7BP10-1BA0
Glossary
207