A
01/2008 Appendix
B Terms
© Siemens AG 2008 All rights reserved.
SINUMERIK 840Di sl/840D sl/840D Operating Manual HMI-Advanced (BAD) - 01/2008 Edition A-461
U
Subprogram
Sequence of statements of a → part program that can be called
repeatedly with different defining parameters. The subprogram is
called from a main program. Every subprogram can be protected
against unauthorized read-out and display.
Cycles are a type of subprogram.
Memory reset
The following → CPU memories are erased by a general reset
operation:
• Working memory
• Read/write area of the → load memory
• System memory
• Backup memory
V
Variable definition
A variable definition includes the specification of a data type and a
variable name. The variable names can be used to access the value
of the variables.
Traversing range
The maximum permissible travel range for linear axes is ± 9 decades.
The absolute value depends on the selected input and position control
resolution and the unit of measurement (inch or metric).
Feed override
The current feedrate setting entered via the control panel or by the
PLC is overlaid on the programmed feedrate (0-200 %). The feedrate
can also be corrected by a programmable percentage factor (1-200 %)
in the machining program.
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