A
Appendix 03.04
B Terms
Path feed
Path feed acts on -> path axes. It represents the geometrical sum of
the feeds on the participating -> geometry axes.
Path velocity
The maximum programmable path velocity depends on the input
resolution. For example, with a resolution of 0.1 mm the maximum
programmable path velocity is 1000 m/min.
PLC
-> Programmable Logic Controller. Component of the -> NC control:
Programmable controller for processing the control logic of the
machine tool.
PLC programming
The PLC is programmed using the STEP 7 software. The STEP 7
programming software is based on the WINDOWS operating system,
and combines the STEP 5 programming functions with additional
innovative functional developments.
PLC program memory
• SINUMERIK FM-NC: PLC user memory of the CPU 314 is used to
store the PLC user program and the user data together with the
PLC basic program. On the
S7-CPU314 version a user memory of 24 kByte is available for this
purpose.
• SINUMERIK 840D: PLC user memory is used to store the PLC
user program and the user data together with the PLC basic
program. The PLC user memory can be upgraded to 96 kByte with
memory expansions.
Polar coordinates
A coordinate system, which defines the position of a point on a plane
in terms of its distance from the zero point and the angle formed by
the radius vector with a defined axis.
Polynomial interpolation
With polynomial interpolation, it is possible to generate many different
curve characteristics, such as straight line-, parabolic-, and
exponential functions (SINUMERIK 840D).
Positioning axis
Axis which performs an auxiliary movement on a machine tool (e.g.
tool magazine, pallet transport). Positioning axes are axes that do not
interpolate with -> path axes.
Power On
Switching the control off and back on again.
Preset
The preset function can be used to redefine the control zero in the
machine coordinate system. Preset does not move the axes, but a
new position value is entered for the current axis positions.
Program
1. Control operating area
2. Sequence of instructions to the control.
Siemens AG, 2004. All rights reserved.
A-158 SINUMERIK 840D/840Di/810D Operator’s Guide Handheld Terminal 6 (BAH) - 03.04 Edition
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