Siemens SINUMERIK 840D sl Function Manual

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If the axis is not referenced (at least in the current control measuring system), then the relatedmonitoring is not active if MD36510 = 0 or if neither of the two measuring systems in the axisis active/available.Types of actual-value acquisitionThe used encoder type must be defined through the following machine data:MD30240 $MA_ENC_TYPE (type of actual-value acquisition (actual position value))Simulation axesThe speed control loop of an axis can be simulated for test purposes.The axis "traverses" with a following error, similar to a real axis.A simulation axis is defined by setting the two following machine data to "0":MD30130 $MA_CTRLOUT_TYPE[n] (output value of setpoint)MD30240 $MA_ENC_TYPE[n] (type of actual-value acquisition)As soon as the standard machine data has been loaded, the axes become simulation axes.The setpoint and actual value can be set to the reference point value with reference pointapproach.The machine data:MD30350 $MA_SIMU_AX_VDI_OUTPUT (output of axis signals with simulation axes)can be used to define whether the axis-specific interface signals are to be output on the PLCduring the simulation.Actual-value correctionIf actual-value corrections performed by the NC on the encoder selected for position controldo not influence the actual value of another encoder defined in the same axis, then this encoderis to be declared as "independent" via the following machine data:MD30242 $MA_ENC_IS_INDEPENDENTActual-value corrections include the following:● Modulo treatment● Reference point approach● Measuring system comparison● PRESETG2: Velocities, setpoint / actual value systems, closed-loop control7.4 Setpoint/actual-value systemBasic Functions338 Function Manual, 01/2015, 6FC5397-0BP40-5BA2