User Manual Of EL8-EC** AC Servo
8
5.7.1 Common Functions of Torque Mode ..................................................................................... 223
5.7.2 Cyclic Synchronous Torque Mode (CST) ................................................................................. 224
5.7.3 Profile Torque Mode (PT) ....................................................................................................... 225
CHAPTER 6 APPLICATION ................................................................................................................. 227
6.1 GAIN ADJUSTMENT ............................................................................................................................ 227
6.2 INERTIA RATIO IDENTIFIC AT ION ............................................................................................................. 229
6.2.1 Online inertia determination ................................................................................................. 230
6.2.2 Offline inertia determination................................................................................................. 230
6.3 EASY TUNING.................................................................................................................................... 232
6.3.1 Single Parameter Tuning ....................................................................................................... 232
6.3.2 One-click Tuning .................................................................................................................... 233
6.4 AUTO GAIN ADJUSTMENT .................................................................................................................... 235
6.5 MANUAL GAIN ADJUSTMENT ................................................................................................................ 240
6.6 PARAMETERS ADJUSTMENT UNDER DIFFERENT CONTROL MODES ................................................................. 242
6.7 GAIN SWITCHING ............................................................................................................................... 243
6.7 3RD GAIN SWITCHING ......................................................................................................................... 249
6.8 FEEDFORWARD GAIN .......................................................................................................................... 250
6.8.1 Velocity feedforward ............................................................................................................. 251
6.8.2 Torque feedforward ............................................................................................................... 252
6.9 MODEL FOLLOWING CONTROL .............................................................................................................. 253
6.10 ZERO TRACKING CONTROL ................................................................................................................. 254
6.11 FRICTION COMPENSATION FUNCTION ................................................................................................... 256
6.12 VIBRATION SUPPRESSION .................................................................................................................. 257
6.12.1 Mechanical resonance suppression ..................................................................................... 257
6.12.2 End vibration suppression ................................................................................................... 259
6.12.3 Mechanical properties analysis ........................................................................................... 260
6.13 POSITION COMPARISON .................................................................................................................... 260
6.15 FULL CLOSED LOOP CONTROL.............................................................................................................. 267
6.16 MULTITURN ABSOLUTE ENCODER ........................................................................................................ 270
6.16.1 Parameters setting .............................................................................................................. 270
6.16.2 Read absolute position ........................................................................................................ 270
6.16.3 Absolute Encoder Related Alarm ......................................................................................... 275
6.16.6 Battery kit ............................................................................................................................ 275
6.17 PROBE ........................................................................................................................................... 276
6.17.1 Probe function ..................................................................................................................... 277
6.17.2 Signal Input of EXT1 and EXT2 ............................................................................................. 278
6.17.3 Probe Control Word 60B8h .................................................................................................. 278
6.17.4 Probe Status Word 60B9h ................................................................................................... 279
6.17.6 Latch Position Register ........................................................................................................ 279
6.17.7 Latch Counter Register ........................................................................................................ 280
6.17.8 Probe mode ......................................................................................................................... 280
6.18 SAFETY FUNCTIONS .......................................................................................................................... 281
6.18.1 External brake deactivation output signal BRK-OFF ............................................................ 281
6.18.2 Emergency stop function ..................................................................................................... 283
6.19 OTHER FUNCTIONS .......................................................................................................................... 284
6.19.1 Functions under Position mode ........................................................................................... 284
6.19.2 Functions under velocity mode ............................................................................................ 288
6.19.3 Functions under torque mode ............................................................................................. 290
CHAPTER 7 ETHERCAT COMMUNICATION ........................................................................................ 291
7.1 ETHERCAT PRINCIPLE FUNCTION ........................................................................................................... 291
7.2 SYNCHRONOUS MODE ........................................................................................................................ 292
7.2.1 Free Running Mode ............................................................................................................... 292
7.2.2 Distributed clock synchronization mode ................................................................................ 292
7.3 ETHERCAT STATE MACHINE .................................................................................................................. 293
7.4 CANOPEN OVER ETHERCAT (COE) ....................................................................................................... 294