Siemens SINAMICS G115D Operating Instructions Manual page 11

6.15.2 Specifying the setpoint via the fieldbus ............................................................................ 231
6.15.3 Electromechanical potentiometer .................................................................................... 232
6.15.4 Motorized potentiometer as setpoint source..................................................................... 233
6.15.5 Fixed speed setpoint as setpoint source ............................................................................ 236
6.16 Setpoint processing ......................................................................................................... 239
6.16.1 Overview ......................................................................................................................... 239
6.16.2 Invert setpoint ................................................................................................................. 239
6.16.3 Inhibit direction of rotation .............................................................................................. 240
6.16.4 Skip frequency bands and minimum speed ....................................................................... 241
6.16.5 Speed limitation .............................................................................................................. 243
6.16.6 Ramp-function generator ................................................................................................. 244
6.17 PID technology controller ................................................................................................. 248
6.18 Motor control .................................................................................................................. 254
6.18.1 U/f control ....................................................................................................................... 255
6.18.1.1 Characteristics of U/f control ............................................................................................ 256
6.18.1.2 Selecting the U/f characteristic ......................................................................................... 257
6.18.1.3 Optimizing motor starting ................................................................................................ 258
6.18.2 Sensorless vector control with speed controller ................................................................ 260
6.18.2.1 Structure of vector control without encoder (sensorless) .................................................. 260
6.18.2.2 Optimizing the closed-loop speed controller ..................................................................... 262
6.18.2.3 Advanced settings ........................................................................................................... 264
6.18.2.4 Friction characteristic ....................................................................................................... 266
6.18.2.5 Moment of inertia estimator ............................................................................................ 268
6.18.2.6 Pole position identification ............................................................................................... 274
6.18.3 Torque control ................................................................................................................. 275
6.19 Electrically braking the motor ........................................................................................... 276
6.19.1 DC braking ....................................................................................................................... 277
6.19.2 Dynamic braking .............................................................................................................. 280
6.20 Overcurrent protection .................................................................................................... 281
6.21 Converter protection using temperature monitoring ......................................................... 282
6.22 Motor temperature monitoring using a temperature sensor .............................................. 285
6.23 Motor protection by calculating the temperature .............................................................. 288
6.24 Motor and converter protection by limiting the voltage .................................................... 290
6.25 Monitoring the driven load............................................................................................... 291
6.25.1 No-load monitoring ......................................................................................................... 292
6.25.2 Rotation monitoring......................................................................................................... 292
6.25.3 Torque monitoring ........................................................................................................... 293
6.25.4 Blocking protection, leakage protection and dry-running protection ................................. 295
6.26 Efficiency optimization ..................................................................................................... 298
6.27 Calculating the energy saving for fluid flow machines ...................................................... 301
6.28 Switchover between different settings ............................................................................. 303
7 Data backup and series commissioning ............................................................................................ 305
7.1 Transferring settings using a memory card ....................................................................... 305
7.1.1 Memory cards .................................................................................................................. 305
7.1.2 Converter → Memory card ............................................................................................... 307
SINAMICS G115D distributed drive
Operating Instructions, 12/2020, FW V4.7 SP13, A5E48681219B-002
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