Rockwell-automation 20B PowerFlex 70, PowerFlex 700 Reference Manual Manual de usuario Pagina 172
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Speed/Torque Select
172 Rockwell Automation Publication PFLEX-RM001H-EN-P - June 2013
value of zero. Units are (per unit torque) / (per unit speed). For example, when
[Kp Speed Loop] is 20, the proportional gain block will output 20% motor rated
torque for every 1% error of motor rated speed.
Feed Forward Gain
The first section of the PI regulator is the feed forward block. [Kf Speed Loop]
allows the speed regulator to be dampened during speed changes. To reduce
speed overshoot, reduce the value of [Kf Speed Loop]. During auto-tune, the
feed forward is left open (no dampening).
Speed Desired BW
[Speed Desired BW] sets the speed loop bandwidth and determines the dynamic
behavior of the speed loop. As bandwidth increases, the speed loop becomes
more responsive and can track a faster changing speed reference. Adjusting this
parameter will cause the drive to calculate and change [Ki Speed Loop] and [Kp
Speed Loop] gains.
Total Inertia
[Total Inertia] represents the time in seconds, for a motor coupled to a load to
accelerate from zero to base speed, at rated motor torque. The drive calculates
Total Inertia during the autotune inertia procedure. Adjusting this parameter will
cause the drive to calculate and change [Ki Speed Loop] and [Kp Speed Loop]
gains.
Speed/Torque Select [Speed/Torque Mod] is used to choose the operating mode for the
drive. The drive can be programmed to operate as a velocity regulator, a torque
regulator, or a combination of the two. Refer to Figure 37
.
Figure 37
Vector
FV
Vector
FV
Vector
FV
Vector
FV
431
Scale
Scale
433
432
429
428
434
430
0
0
1
2
3
4
5
6
/
x
+
Ref A Hi
Ref A Lo
Ref B Hi
Torq Ref A Div
Speed/Torque Mod
Spd Reg PI Out
Torq Ref B Mult
Ref B Lo
Torque Ref B Sel
427
Torque Ref A Sel
88
Min
Max
+
abs
Min
- Reference Manual 1
- Important User Information 2
- Summary of Changes 3
- New and Updated 3
- Information 3
- Table of Contents 5
- Chapter 1 9
- General Precautions 10
- Detailed Drive Operation 11
- Alarm Status Indication 15
- INPUTS & OUTPUTS 17
- Analog Input Configuration 19
- Analog Inputs 20
- Analog Scaling 22
- Output Hertz 23
- Input mA 24
- Torque Ref % 26
- Input Volts 26
- Value Display 28
- Cable Selection 28
- Explanation 31
- Output Current 32
- Output Voltage 32
- Table 1 Software Filters 34
- Auto/Manual 37
- Autotune 40
- PowerFlex 700VC 44
- Speed Control - Reference 46
- (2.0 ms) 46
- Speed Control - Regulator 48
- (1.0 ms) 48
- Torque Control 49
- (0.25ms) 49
- Process Trim 50
- MOP Control 51
- Block Diagrams 52
- Inputs & Outputs - Analog 53
- Control Logic 54
- (2.0ms) 54
- Inverter Overload IT 55
- Bus Regulation [Bus Reg Gain] 56
- Single Seq 500 S/s 56
- Operation 57
- Motor Speed 57
- Proportional Channel 58
- Integral Channel 58
- Bus Regulation 59
- Table 3 60
- Table 4 61
- Carrier (PWM) Frequency 62
- EMC Instructions 63
- Table 8 Recommended Filters 65
- Current Limit 66
- Datalinks 67
- Decel Time [Decel Time 1, 2] 69
- Wiring Examples 70
- Digital Inputs 75
- Digital Input Conflict Alarms 83
- Output Time Delay 90
- Client/Server 92
- Peer-to-Peer operation 93
- Overall RMS Protection 95
- Drive Overload 96
- Thermal Manager Protection 97
- PWM Frequency 97
- DTO Fault 98
- Temperature Display 98
- Low Speed Operation 98
- Drive Ratings (kW, Amps 99
- Economizer 99
- (Auto-Economizer) 99
- Fan See Fan Curve above 100
- When a Fault Occurs 101
- Fault Queue 101
- Fault Time [Fault 1-8 Time] 102
- Resetting or Clearing a Fault 102
- Flux Braking 103
- Flux Up [Flux Up Mode] 104
- Flying Start 105
- Configuration 106
- Application Example 106
- Input Devices Contactors 108
- Input Power Conditioning 110
- Table 13 Linkable Parameters 112
- COMMUNICATION 113
- 00000100 114
- Adapter # X6543210 114
- Motor Control 115
- Trip Time (Seconds) 117
- Motor Overload 118
- 20 Minutes 119
- 1 Minute 1 Minute 119
- Motor Start/Stop 120
- Precautions 120
- Jm Jload 121
- Figure 26 Resonance 122
- Figure 27 10 Hz Notch 122
- Drive Output Contactor 123
- Cable Termination 123
- Output Frequency 124
- COMMUNICATIONS 126
- Table 14 PF70 Bus Levels 128
- Table 15 PF700 Bus Levels 129
- Power Loss 131
- Decel Input (PF700 only) 134
- Process PI Loop [PI Config] 135
- 10 Volts 136
- Process PI Loop 137
- Normalized Feedback 141
- Normalized SQRT(Feedback) 141
- PI Reference and Feedback 143
- PI Reference Scaling 143
- PI Setpoint 144
- PI Output 144
- PI Gains 144
- Positive and Negative Limits 145
- Output Scaling 145
- Vector v3 147
- Factory Default Bit Values 148
- Reflected Wave [Compensation] 149
- 50 10152025 149
- 30 35404550 149
- Reflected Wave 150
- Example Configuration #1 154
- Example Configuration #2 155
- Analog Out1 Value (Volts) 155
- Scale1 In Value = 155
- Encoder Speed (RPM) 155
- Example Configuration #3 156
- PI Reference 156
- Analog In2 Value (Volts) 156
- DYNAMIC CONTROL 157
- Figure 31 Skip Frequency 158
- . This function affects 159
- Sleep Mode Operation 160
- Interactive functions 161
- Sleep/Wake Levels 161
- Sleep/Wake Sources 161
- Wake Level 162
- Sleep Level 162
- Analog Signal 162
- Speed Reference Operation 167
- Frequency Reference 169
- Figure 36 Trim 170
- Speed Regulator 171
- Figure 37 172
- Speed Regulation Mode 173
- Torque Regulation Mode 173
- Figure 38 174
- Figure 39 175
- Permissive Conditions 176
- Start-Up Start-Up Routines 177
- Basic Start Up (Top Level) 178
- Start-Up 179
- Basic Start Up (Motor Tests) 181
- Basic Start Up (Speed Limits) 182
- Stop Modes [Stop Mode A, B] 197
- Stop Modes 198
- Test Points 200
- Torque Performance 201
- Sensorless Vector 202
- V/Hz Control 202
- Flux Vector Control 203
- Figure 59 Flux Vector 204
- Figure 60 204
- Unbalanced or 205
- Ungrounded Distribution 205
- Figure 61 User Sets 206
- Voltage Class 207
- Watts Loss 208
- Rockwell Automation Support 214
- Documentation Feedback 214
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