Siemens sinumerik 840D sl Function Manual

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Contents

Detailed description2.3 Master value couplingSpecial functions: Axis Couplings and ESR (M3)Function Manual, 11/2006, 6FC5397-2BP10-2BA0 492.3 Master value coupling2.3.1 General functionalityIntroductionMaster 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 couplingAxis master value coupling is an axis coupling with rules of motion that are representedinternally as a one-dimensional real function, a curve table.Master value objectIs 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 producesa better following response than is possible for actual-value coupling (in the same IPOcycle).• If the leading axis is not interpolated by the same NCU, the interpolator that isimplemented in the NCU for this particular leading axis can be used for master valuesimulation. The following machine data must be set:MD30132 $MA_IS_VIRTUAL_AX=1 (axis is virtual axis)NoteSetpoint coupling is the default setting for the master value object.