
User Manual of EL7-RS***PAC Servo
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CHAPTER 6 APPLICATION CASE .......................................................................................................................... 213
6.1 GAIN ADJUSTMENT ...............................................................................................................................................213
6.2 INERTIA RATIO IDENTIFICATION FUNCTION ..................................................................................................................215
6.3 EASY TUNING.......................................................................................................................................................219
6.3.1 Single parameter tuning...........................................................................................................................219
6.3.2 One-click Tuning .......................................................................................................................................220
6.4 AUTO GAIN ADJUSTMENT .......................................................................................................................................222
6.5 MANUAL GAINADJUSTMENT............................................................................................................................227
6.5.1 Parameters adjustment under different control modes ...........................................................................229
6.5.2 Gain switching ..........................................................................................................................................231
6.5.3 3rd gain switching .....................................................................................................................................235
6.6 MODEL FOLLOWING CONTROL .................................................................................................................................236
6.7 ZERO TRACKING CONTROL.......................................................................................................................................237
6.8FEEDFORWARD GAIN .............................................................................................................................................238
6.8.1 Velocity feedforward ................................................................................................................................238
6.6.2 Torque feedforward ..................................................................................................................................239
6.9 FRICTION COMPENSATION FUNCTION ........................................................................................................................241
6.10 SAFETY FUNCTIONS .............................................................................................................................................242
6.10.1 Max. motor rotational speed limitation .................................................................................................242
6.10.2 Max. duration for motor to stop after disabling.....................................................................................243
6.10.3 External brake deactivation output signal BRK-OFF...............................................................................243
6.10.4 Servo stopping mode..............................................................................................................................245
6.10.5 Emergency stop function ........................................................................................................................246
6.11 VIBRATION SUPPRESSION .....................................................................................................................................247
6.11.1 Mechanical resonance suppression........................................................................................................247
6.11.2 End vibration suppression ......................................................................................................................251
6.11.3 Mechanical properties analysis ..............................................................................................................252
6.12 BLACK BOX ........................................................................................................................................................253
6.13 MULTITURN ABSOLUTE ENCODER ...........................................................................................................................256
6.13.1 Parameters setting .................................................................................................................................256
6.13.2 Read absolute position ...........................................................................................................................256
6.13.3 Absolute Encoder Related Alarm ............................................................................................................261
6.14 MOTOR SPEED REGULATI ON .................................................................................................................................262
6.14.1 Set up motor speed regulation ...............................................................................................................262
CHAPTER 7 MODBUS COMMUNICATION ........................................................................................................... 266
7.1 RS232 AND RS485 CONNECTION DIAGRAM. ............................................................................................................266
7.2 RS485 COMMUNICATION PORT...............................................................................................................................267
7.3 MODBUS PROTOCOL .............................................................................................................................................268
7.3.1 Read Data 0x03 ........................................................................................................................................268
7.3.2 Write multiple data 0x10..........................................................................................................................269
7.4 FREQUENTLY OCCURRED ISSUES AND SOLUTIONS WITH RS485 COMMUNICATION. .............................................................271
CHAPTER 8 PR FUNCTIONS................................................................................................................................. 273
8.1 PR FUNCTIONS INTRODUCTION................................................................................................................................274
8.2 CONTROL PARAMETERS ..........................................................................................................................................275
8.3 PR MOTION ........................................................................................................................................................277
8.3.1 Homing .....................................................................................................................................................277
8.3.2 Position limit and emergency stop ...........................................................................................................282
8.3.3 JOG ...........................................................................................................................................................282
8.3.4 Path motion..............................................................................................................................................283
8.4 PR CONTROL .......................................................................................................................................................286