Siemens SINUMERIK 840D sl Function Manual page 965

Macro techniques
Grouping of a set of statements under a single identifier. The identifier represents the set of
consolidated statements in the program.
Main block
A block preceded with ":" that contains all information to start the operating sequence in a
→ part program.
Main program
The term "main program" has its origins during the time when part programs were split strictly
into main and → subprograms. This strict division no longer exists with today's SINUMERIK
NC language. In principle, any part program in the channel can be selected and started. It then
runs through in → program level 0 (main program level). Further part programs or → cycles as
subprograms can be called up in the main program.
MDI
Operating mode of the control: Manual Data Input. In the MDI mode, individual program blocks
or block sequences with no reference to a main program or subprogram can be input and
executed immediately afterwards through actuation of the NC start key.
Messages
All messages programmed in the part program and → alarms detected by the system are
displayed on the operator panel in plain text with date and time and the corresponding symbol
for the deletion criterion. Alarms and messages are displayed separately.
Metric measuring system
Standardized system of units: For length, e.g. mm (millimeters), m (meters).
Mirroring
Mirroring reverses the signs of the coordinate values of a contour, with respect to an axis. It
is possible to mirror with respect to more than one axis at a time.
Mode
An operating concept on a SINUMERIK control The following modes are defined: → Jog, → MDI,
→ Automatic.
Mode group
Axes and spindles that are technologically related can be combined into one mode group.
Axes/spindles of a mode group can be controlled by one or more → channels. The same
→ mode type is always assigned to the channels of the mode group.
Extended Functions
Function Manual, 10/2015, 6FC5397-1BP40-5BA3
Glossary
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