Siemens SINUMERIK 840DE Programming Manual page 479

Backup
Saving the memory contents to an external memory device.
Backup battery
The backup battery ensures that the -> user program is reliably backed up in the -> CPU
against mains failure and that fixed data areas and markers, times and counters are kept in
non-volatile memory.
Back-up memory
The backup memory enables buffering of memory areas of the -> CPU without a buffer
battery. Buffering can be performed for a configurable number of times, counters, markers
and databytes.
Basic axis
Axis whose setpoint or actual value position forms the basis of the calculation of a
compensation value.
Basic Coordinate System
Cartesian coordinate system, which is mapped by transformation onto the machine
coordinate system.
In the -> parts program, the programmer uses the axis names of the basic coordinate
system. The basic coordinate system exists in parallel to the -> machine coordinate system
when no -> transformation is active. The difference between the systems relates to the axis
identifiers.
Baud rate
Rate of data transfer (Bit/s).
Blank
Workpiece as it is before a part is machined.
Block
"Block" is the term given to any files required for creating and processing programs.
Block search
For testing part programs or following interruption of machining, it is possible to select any
point in the parts program using the block search function in order to start or resume at this
point.
Booting
Loading the system program after power on.
Fundamentals
Programming Manual, 10.2004 Edition, 6FC5 298-7AB00-0BP1
Glossary
Glossary-3