05.91
21 Terms and Abbreviations
INCR
NC mode
INT-EU/MPC
Interface module for MPC bus, inserted in the central
controller
Interface signal
Individual bit or data that can be evaluated or modified by
the PLC user program. Serves as a user interface to a
separate SINUMERIK 880 unit, e.g. an NC channel,
the operator panel or another PLC CPU. The interface
signals are located in data blocks or the I/Q/F areas.
Interpolator
The interpolator calculates the path points for machining
the workpiece until the destination point programmed in
the part program. The programmed preparatory functions
are taken into account. Each NC channel has its own
interpolator.
JOG
NC mode
KF
Number format, decimal fixed-point number (binary
signed)
K
Ü
factor
Speed ratio
K
V
factor
Servo gain factor
KY
Number format, byte
Link bus
Bus in the central controller which links the individual
CPUs of the separate areas (NC, PLC, COM) to the
link RAM
Link RAM
Memory area used for communication between the NC,
COM and PLC areas. Located on a memory module on
the link bus which can be accessed by the CPUs of the
NC, COM and PLC areas (dualport or multiport RAM).
Local bus
Bus in the central controller which links the individual
CPUs to the modules to which only the CPU concerned
has access
Local I/Os
I/Os accessible via the local bus of the PLC; see
Section 1
Logical partner;
peer
See Computer Link documentation
M decoding
PLC mechanism which influences the M signals in the
PLC according to the M functions contained in the part
program
M function
Miscellaneous function for NC part programs. Some M
functions have fixed meanings, others can be freely
defined.
M signal
Signal in data blocks which is influenced by M
functions contained in the NC part program
M word
Word (parameter) in the part program for a
miscellaneous function
© Siemens AG 1991 All Rights Reserved 6ZB5 410-0HE02
21–5
SINUMERIK 880 (PJ)
