Siemens SINUMERIK 840Di sl Programming Manual page 531

Compensation value
Difference between the axis position measured by the position sensor and the desired,
programmed axis position.
Connecting cables
Connecting cables are pre-assembled or user-assembled 2-wire cables with a connector at
each end. This connecting cable connects the → CPU to a → programming device or to other
CPUs by means of a → multi-point interface (MPI).
Continuous-path mode
The purpose of continuous-path mode is to prevent excessive deceleration of the -> path
axes at the part program block boundaries (in terms of the control, machine and other
properties of the operation and the user) and to effect the transition to the next block at as
uniform a path speed as possible.
Contour
Outline of the -> workpiece
Contour monitoring
The following error is monitored within a defined tolerance band to ensure contour precision.
An impermissibly high following error might be caused by a drive overload, for example. In
this case an alarm is triggered and the axes are stopped.
coordinate system
See -> Machine Coordinate System, -> Workpiece Coordinate System
CPU
Central Processor Unit, see -> Programmable Logic Controller
Data Block
1. Data unit of the -> PLC, which the -> HIGHSTEP programs can access.
2. Data unit of the -> NC: Data blocks contain data definitions for global user data. These
Data transmission program PCIN
PCIN is an auxiliary program which is used to send and receive CNC user data via the serial
interface, such as e.g. parts programs, tool offsets etc. The PCIN program can be executed
under MS-DOS on standard industrial PCs.
Fundamentals
Programming Manual, 11/2006, 6FC5398-1BP10-2BA0
data can be initialized directly when they are defined.
Glossary
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