Glossary
Glossary-14 Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
Path velocity
The maximum programmable path velocity is dependent on the input resolution. For
example, for a resolution of 0.1 mm the maximum programmable path velocity is
1000 m/min.
PCIN data transfer program
PCIN is an auxiliary program for sending and receiving CNC user data (e.g., part programs,
tool offsets, etc.) via a serial interface. The PCIN program can run in MS-DOS on standard
industrial PCs.
PLC
Programmable Logic Control: Component of → NC: Programmable controller for processing
the control logic of the machine tool.
PLC program memory
SINUMERIK 840D: The PLC user program and the user data are stored together with the
PLC basic program in the PLC user memory.
PLC Programming
The PLC is programmed using the STEP 7 software. The STEP 7 programming software is
based on the WINDOWS standard operating system and contains the STEP 5 programming
functions with innovative enhancements.
Polar coordinates
A coordinate system that 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.
Polynominal interpolation
Polynomial interpolation enables a wide variety of curve characteristics to be generated,
such as straight line, parabolic, 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 using → path axes.
Pre-coincidence
Block change occurs already when the path distance approaches an amount equal to a
specifiable delta of the end position.
Program block
Program blocks contain the main program and subroutines of → part programs.
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