Detailed description
2.4 Closed-loop control
Basic logic functions: Velocities, Setpoint/Actual Value Systems, Closed-Loop Control (G2)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0
65
2.4.3
Extending the parameter set
Application
Some machines use the same drive for moving various machine parts, which, in view of
considerably varying speeds, results in a gear stage change. With each gear stage change,
the corresponding parameter set is also switched over.
Now several parameter sets are provided for further practical applications and for setting the
feedforward control of the control loop.
Functionality
To optimize closed-loop control during startup, these codable parameter sets support
practiceoriented startup by substantially reducing configuration expenditure with regard to
the new functions, such as backlash compensation, feedforward control factor, exact stop
limits, and zero-speed window.
New parameter sets
Until now it has been possible to change the gear ratio and other control loop parameters
(such as achievable control servo gain) by switching over the servo parameter set. The
already existing machine data with parameter set coding are extended as follows:
Parameter set coding (modifiable as a function of parameter set)
Backlash compensation
MD32450 $MA_BACKLASH[n] (max. number of
encoders)
Feedforward control factor
MD32610 $MA_VELO_FFW_WEIGHT[n]
Exact stop limits
MD36000 $MA_STOP_LIMIT_COARSE
MD36010 $MA_STOP_LIMIT_FINE
Zero-speed window
MD36030 $MA_STANSTILL_POS_TOL
Weighting factor for parameter set changeover
Weighting factor for:
MD32452 $MA_BACKLASH_FACTOR[n]
•
Backlash compensation
MD32450 $MA_BACKLASH[n]
Weighting factor for:
MD36012 $MA_STOP_LIMIT_FACTOR[n]
•
Exact stop limits
MD36000 $MA_STOP_LIMIT_COARSE
MD36010 $MA_STOP_LIMIT_FINE
•
Zero-speed window
MD36030 $MA_STANSTILL_POS_TOL
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 ...