Master Value Coupling; Product Brief; Function; Preconditions - Siemens SINUMERIK 840D sl Function Manual

5.3

Master value coupling

5.3.1

Product brief

5.3.1.1

Function

The "master value coupling" function can be used to process short programs cyclically with
close coupling of the axes to one another and a master value that is either generated
internally or input from an external source.
The master value can for example be derived from a conveyor belt or a vertical shaft.
Either an axis- or path- master value coupling can be used and activated and deactivated in
the NC part program or by using a synchronous action.
Coupling with the master value is defined using a curve table.
5.3.1.2

Preconditions

The option "Master Value Coupling and Curve Tables Interpolation" or the relevant option of
generic coupling (refer to " Preconditions [Page 268] " in the "Brief description" for generic
coupling) is a prerequisite for utilization of the function.
5.3.2

General functionality

Master value couplings are divided into axis and path master value couplings. In both cases,
the axis and path positions are defined by the control system on the basis of master values
(e.g. positions of an additional axis).
Axis master value coupling
Axis master value coupling is an axis coupling with rules of motion that are represented
internally as a one-dimensional real function, a curve table.
Master value object
The master value object is the input variable for the curve table.
The following can be defined as the position of the master value object:
• the axis actual position (actual value measured by transmitter)
or
• the setpoint position (calculated from interpolator) (default)
If the leading axis is interpolated by the same NCU, the setpoint coupling delivers a better
follow-up response than is possible for actual value coupling (in the same IPO cycle).
Special Functions
Function Manual, 09/2011, 6FC5397-2BP40-2BA0
M3: Coupled axes
5.3 Master value coupling
235