
01.99
12 Abbreviations / Glossary
© Siemens AG 1999 All Rights Reserved
6FC5198-6AA60-0BP1
SINUMERIK 840C, OEM Version for Windows (BA)
12-5
Block search
When verifying part programs or after processing has been interrupted, the
block search function can be used to select any point in the part program at
which processing is to start or be continued. Block search can be performed
with or without calculation.
Boot
Loading of the system program after Power On.
C axis
Axis about which a controlled rotary motion and positioning take place with
the workpiece spindle.
Channel
A channel is characterised by its ability to execute a part program
independently of other channels. Part program sequences in different channels
can be co-ordinated by synchronisation.
Clipboard
When copying and reading in data, the data can, if required, always be stored
first of all in the clipboard (buffer) from which it can then be inserted/arranged
in a specific directory.
CNC
-> NC
COM1, COM2
Serial interfaces on the CPU module
CPU
Central Processing Unit
Cursor
Marker used in editors, input boxes etc. to identify the position.
Cutter radius
compensation
When programming a contour, the tool is assumed to be pointed. Because this
is not a real life situation, the radius of curvature of the tool used by the control
is specified and allowance is made for this. The centre of curvature is shifted
by the radius of curvature equidistantly around the contour.
Cycle
Protected subroutine for executing a repetitively occurring machining
operation on the workpiece.
Data
Individual value(s), e.g. machine data.
Data block
Data unit of the PLC to which STEP 5 programs can access.
Data selector
Aid for selecting and displaying files and directories.
Data transfer
program PCIN
PCIN is a universal program for sending and receiving CNC user data through
the serial interface, e.g. part programs, tool offsets etc. The PCIN program will
run under MS-DOS on standard industrial PCs.
Data word
Two-byte data unit within a data block.
Diagnosis
Operating area in the control
Dialog
Dialog text shown on the screen in accordance with a menu and to which a
reply is expected by means of softkey functions or by pressing a key.
Directory
Organisation unit for the hierarchical management of the data on a hard disk.
Files and/or further (sub)directories can be stored within a directory.