Detailed description
2.3 Setpoint /actual-value system
Basic logic functions: Velocities, Setpoint/Actual Value Systems, Closed-Loop Control (G2)
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Function Manual, 11/2006, 6FC5397-0BP10-2BA0
Types of actual-value acquisition
The used edcoder type must be defined through the following machine data:
MD30240 $MA_ENC_TYPE (type of actual-value acquisition (actual position value))
Simulation axes
The 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 have been loaded, the axes become simulation axes.
The setpoint and actual value can be set to the reference point value with reference point
approach.
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 PLC
during the simulation.
Actual-value correction
If actual-value corrections performed by the NC on the encoder selected for position control
do not influence the actual value of another encoder defined in the same axis, then this
encoder is to be declared as "independent" via the following machine data:
MD30242 $MA_ENC_IS_INDEPENDENT
Actual-value corrections include the following:
•
Modulo treatment
•
Reference point approach
•
Measuring system comparison
•
PRESET
Summary of Contents for SINUMERIK 840D sl
Page 282: ...Index Basic logic functions Acceleration B2 64 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Page 388: ...Basic logic functions Travel to fixed stop F1 Function Manual 11 2006 6FC5397 0BP10 2BA0 52 ...
Page 962: ...Index Basic logic functions Emergency Stop N2 20 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Page 1704: ...Constraints Basic logic functions Spindles S1 94 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Page 1716: ...Index Basic logic functions Spindles S1 106 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Page 1996: ...Index Basic logic functions Tool Offset W1 208 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Page 2150: ...Table of contents Basic logic functions Appendix 4 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Page 2184: ...Glossary Basic logic functions Appendix 38 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...