Table of Contents
Advertisement
6.5.1.4
Fixed speed setpoint as setpoint source..............................................................................333
6.5.2
Setpoint processing..............................................................................................................338
6.5.2.1
Overview ..............................................................................................................................338
6.5.2.2
Invert setpoint.......................................................................................................................339
6.5.2.3
Enable direction of rotation ..................................................................................................340
6.5.2.4
Skip frequency bands and minimum speed .........................................................................341
6.5.2.5
Speed limitation....................................................................................................................344
6.5.2.6
Ramp-function generator .....................................................................................................345
6.5.2.7
Dual ramp function ...............................................................................................................348
6.6
Technology controller...........................................................................................................350
6.6.1
PID technology controller .....................................................................................................350
6.6.1.1
Autotuning the PID technology controller.............................................................................361
6.6.1.2
Adapting Kp and Tn .............................................................................................................364
6.6.2
Free technology controllers..................................................................................................367
6.6.3
Cascade control ...................................................................................................................368
6.6.4
Real time clock (RTC) ..........................................................................................................373
6.6.5
Time switch (DTC) ...............................................................................................................375
6.7
Motor control ........................................................................................................................376
6.7.1
Reactor, filter and cable resistance at the converter output.................................................376
6.7.2
V/f control .............................................................................................................................377
6.7.2.1
U/f control.............................................................................................................................377
6.7.2.2
Optimizing motor starting .....................................................................................................382
6.7.2.3
U/f control with Standard Drive Control................................................................................387
6.7.2.4
Optimizing the motor start-up for application class Standard Drive Control.........................389
6.7.3
Encoderless vector control...................................................................................................391
6.7.3.1
Structure of vector control without encoder (sensorless) .....................................................391
6.7.3.2
Optimizing the speed controller............................................................................................396
6.7.4
Electrically braking the motor ...............................................................................................398
6.7.4.1
DC braking ...........................................................................................................................400
6.7.4.2
Compound braking...............................................................................................................402
6.7.5
Pulse frequency wobbling ....................................................................................................403
6.8
Drive protection ....................................................................................................................404
6.8.1
Overcurrent protection .........................................................................................................404
6.8.2
Converter protection using temperature monitoring.............................................................406
6.8.3
Motor protection with temperature sensor............................................................................409
6.8.4
Motor protection by calculating the temperature ..................................................................412
6.8.5
Motor and converter protection by limiting the voltage.........................................................414
6.8.6
Monitoring the driven load....................................................................................................415
6.8.6.1
Stall protection .....................................................................................................................417
6.8.6.2
No-load monitoring...............................................................................................................417
6.8.6.3
Blocking protection...............................................................................................................418
6.8.6.4
Torque monitoring ................................................................................................................419
6.8.6.5
Blocking protection, leakage protection and dry-running protection ....................................420
6.8.6.6
Rotation monitoring ..............................................................................................................422
6.9
Drive availability ...................................................................................................................423
6.9.1
Flying restart – switching on while the motor is running.......................................................423
6.9.2
Automatic restart ..................................................................................................................425
6.9.3
Kinetic buffering (Vdc min control) .......................................................................................428
6.9.4
Essential service mode ........................................................................................................429
6.10
Energy saving ......................................................................................................................434
SINAMICS G120X converter
Operating Instructions, 06/2019, FW V1.01, A5E44751209B AC
Table of contents
7
Advertisement
Table of Contents
