Siemens SINUMERIK 840DE Programming Manual page 492

Glossary
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.
PG
Programming device
PLC
Programmable Logic Control: -> Programmable Logic Controller. Component of the -> NC:
Programmable controller for processing the control logic of the machine tool.
See -> Programmable Logic Controller.
PLC
Programmable Logic Control: -> Programmable Logic Controller. Component of the -> NC:
Programmable controller for processing the control logic of the machine tool.
See -> Programmable Logic Controller.
PLC program memory
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.
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.
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).
Glossary-16
Programming Manual, 10.2004 Edition, 6FC5 298-7AB00-0BP1
Fundamentals