Siemens Sinumerik 840D sl Programming Manual page 203

Part program management
The "part program management" function can be organized according to the -> workpieces.
The number of programs and data to be managed depends on the capacity of the control
memory and can also be configured via machine data settings. A name consisting of a
maximum of 16 alphanumeric characters can be assigned to each file (programs and data).
Path axis
Path axes are all the machining axes of a -> channel, that is controlled by the -> interpolator
in such a way that they start together, accelerate at the same time and reach their end
position at the same time.
Path feedrate
The path feedrate acts on the -> path axes. It represents the geometrical sum of the
feedrates of the participating -> path axes.
Path velocity
The maximum programmable path velocity depends on the input resolution. The maximum
programmable path velocity at a resolution of, say, 0.1 mm is 1.000 m/min.
PCIN data transfer program
PCIN is a routine for transfer and reception of CNC user data, such as e.g. part programs,
tool offsets etc. over a serial interface. The PCIN program runs on standard commercial PCs
under MS-DOS.
Peripheral module
I/O modules are used to establish a connection between the CPU and the process.
I/O modules are:
Digital input and output modules
Analog input and output modules
Simulator modules
PLC
Programmable Logic Control -> programmable logic control system. Component of -> NC:
Programmable control system for executing the control logic of the machine tool.
PLC program memory
The PLC user program, the user data and the PLC main program are stored together in the
PLC user memory of the PLC. The PLC user memory can be expanded to 128 KB.
ISO Milling
Programming Manual, 06/09, 6FC5398-7BP10-1BA0
Glossary
203