Siemens SINUMERIK 802D sl Function Manual page 449

Look Ahead
The Look Ahead function is used to achieve an optimal machining speed by looking ahead
over an assignable number of traversing blocks.
Machine axes
Physically existent axes on the machine tool.
Machine control panel
An operator panel on a machine tool with operating elements such as keys, rotary switches,
etc., and simple indicators such as LEDs. It is used to directly influence the machine tool via
the PLC.
Machine Coordinate System
A coordinate system, which is related to the axes of the machine tool.
Machine zero
Fixed point of the machine tool to which all (derived) measuring systems can be traced back.
Macro techniques
Grouping of a set of instructions under a single identifier. The identifier represents the set of
consolidated instructions in the program.
Main block
A block prefixed by ":" containing all the parameters required to start execution of a -> part
program.
Main memory
The main memory is a RAM in the → CPU that the processor accesses when processing the
application program.
Main program
The → part program designated by a number or an identifier in which additional main
programs, subroutines or → cycles can be called.
MDI
Control operating mode: Manual Data Automatic. In the MDA mode, individual program
blocks or block sequences with no reference to a main program or subroutine can be input
and executed immediately afterwards through actuation of the NC start key.
Turning, Milling, Nibbling
Function Manual, 11/2012, 6FC5397-1CP10-5BA0
Glossary
449