CONTENTS
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High-function General-purpose Inverter RX2 Series User’s Manual
Section 7 Advanced Settings
7-1 Overview of Motor Control Methods.................................................................................... 7-3
7-2 Selection of Motor Control Methods.................................................................................... 7-5
7-2-1 V/f Control (Constant Torque Characteristics).............................................................................7-5
7-2-2 V/f Control (Reducing Torque Characteristics)............................................................................ 7-6
7-2-3 V/f Control (Free V/f)...................................................................................................................7-7
7-2-4 Energy-Saving Mode.................................................................................................................7-10
7-2-5 Manual Torque Boost ................................................................................................................ 7-11
7-2-6 Automatic Torque Boost ............................................................................................................ 7-12
7-2-7 Stabilization of Motor Rotation ..................................................................................................7-14
7-2-8 Sensorless Vector Control.........................................................................................................7-15
7-2-9 Zero-speed Range (Zero-Hz Range) Sensorless Vector Control.............................................. 7-17
7-2-10 Vector Control with Sensor........................................................................................................7-19
7-2-11 Synchronous Motor (Permanent Magnet Motor) Control ..........................................................7-22
7-2-12 V/f Control with Sensor (Constant Torque Characteristics).......................................................7-32
7-2-13 V/f Control with Sensor (Reducing Torque Characteristics) ......................................................7-33
7-2-14 Free V/f Control with Sensor.....................................................................................................7-34
7-2-15 Automatic Torque Boost Control with Sensor............................................................................7-36
7-2-16 Encoder Feedback Control .......................................................................................................7-37
7-3 Torque Control ..................................................................................................................... 7-43
7-3-1 Speed Control and Torque Control............................................................................................7-43
7-3-2 Control Gain Switching Function...............................................................................................7-43
7-3-3 P/PI Switching Function ............................................................................................................ 7-46
7-3-4 Torque Limit Function................................................................................................................7-48
7-3-5 High-torque Multi-operation Control..........................................................................................7-52
7-3-6 Torque Bias Function ................................................................................................................7-54
7-3-7 Switching Function of Torque Control/Speed Control (ATR) .....................................................7-56
7-3-8 Torque Command......................................................................................................................7-56
7-4 Reduction of Motor Noise, Noise and Inverter Heat Generation..................................... 7-59
7-4-1 Carrier Frequency .....................................................................................................................7-59
7-4-2 Automatic Carrier Reduction.....................................................................................................7-60
7-4-3 Lowering Electromagnetic Noise from Motor ............................................................................7-62
7-5 Start Conditions................................................................................................................... 7-63
7-5-1 Selection of Reduced Voltage Startup ......................................................................................7-63
7-5-2 Startup DC Injection Braking.....................................................................................................7-64
7-5-3 Frequency Matching Start.........................................................................................................7-65
7-5-4 Frequency Pull-in Start.............................................................................................................. 7-69
7-5-5 Starting after Power-on .............................................................................................................7-73
7-5-6 Restart after Releasing Reset...................................................................................................7-74
7-5-7 Starting after Free-run Stop ...................................................................................................... 7-76
7-5-8 Forcing Function .......................................................................................................................7-78
7-5-9 Startup DC Injection Braking (Servo Lock Control)...................................................................7-80
7-6 Stop Conditions................................................................................................................... 7-82
7-6-1 Selection of Stop Operation ...................................................................................................... 7-82
7-6-2 DC Injection Braking Stop.........................................................................................................7-83
7-6-3 DC Braking for Stopping (Servo Lock Control) .........................................................................7-90
Section 8 Applied Settings
8-1 PID Control............................................................................................................................. 8-4
8-1-1 Function Overview ......................................................................................................................8-4
8-1-2 PID Parameter and Block Diagram.............................................................................................8-7
8-1-3 PID Soft-start Function.............................................................................................................. 8-19
8-1-4 PID Sleep Function...................................................................................................................8-21
8-1-5 PID2/PID3/PID4 Control............................................................................................................8-24
8-1-6 PID Signal Output .....................................................................................................................8-33
8-1-7 PID Unit Change.......................................................................................................................8-36
8-2 Tripless Functions............................................................................................................... 8-40
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