Siemens sinumerik 840D sl Function Manual page 269

2.3 Master value coupling
2.3.1 General functionality
Introduction
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
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 (calculated by the interpolator).
• If the leading axis is interpolated by the same NCU, the setpoint value coupling produces
• If the leading axis is not interpolated by the same NCU, the interpolator that is
Special functions: Axis Couplings and ESR (M3)
Function Manual, 11/2006, 6FC5397-2BP10-2BA0
a better following response than is possible for actual-value coupling (in the same IPO
cycle).
implemented in the NCU for this particular leading axis can be used for master value
simulation. The following machine data must be set:
MD30132 $MA_IS_VIRTUAL_AX=1 (axis is virtual axis)
Note
Setpoint coupling is the default setting for the master value object.
Detailed description
2.3 Master value coupling
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