Yaskawa G7 Drive User Manual Page 248
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Speed Limit (Frequency Reference Limit Function)
6-31
Limiting Minimum Frequency
If you do not want the motor to rotate at below a given frequency, use parameters d2-02 or d2-03.
There are two methods of limiting the minimum frequency, as follows:
• Adjust the minimum level for all frequencies.
• Adjust the minimum level for the master speed frequency (i.e., the lower levels of the jog frequency, multi-
step speed frequency, and auxiliary frequency will not be adjusted).
Related Parameters
Adjusting Frequency Lower Limit Using an Analog Input
If you set parameter H3-09 (Multi-function Analog Input Terminal A2 Function Selection) or H3-05 (Multi-
function Analog Input Terminal A3 Function Selection) to 9 (output frequency lower level), you can adjust the
frequency lower level using the terminal A2 input level.
Fig 6.30 Output Frequency Lower Level for Multi-function Analog Input
Parameter
Number
Name
Description
Setting
Range
Factory
Setting
Change
during
Operation
Control Methods
Display
V/f
V/f
with
PG
Open
Loop
Vector
1
Flux
Vector
Open
Loop
Vector
2
d2-02
Frequency
Reference
Lower Limit
Determines maximum frequency
reference, set as a percentage of
maximum output frequency
(E1-04). If the frequency
reference is above this value,
actual Drive speed will be limited
to this value. This parameter
applies to all frequency reference
sources.
0.0
to
110.0
0.0% No A A A A A
Ref Lower
Limit
d2-03
Master Speed
Reference
Lower Limit
Determines maximum frequency
reference, set as a percentage of
maximum output frequency (E1-
04). If the frequency reference is
above this value, actual Drive
speed will be limited to this value.
This parameter applies to all
frequency reference sources.
0.0
to
110.0
0.0% No A A A A A
Ref1 Lower
Limit
INFO
If parameter d2-02 and terminal A2 output frequency lower level have been set at the same time, the larger
set value will become the frequency lower limit.
Output frequency lower level
0 V
(4 mA)
Multi-function analog input
terminal A2 or A3 input level
10 V
(20 mA)
Max. output frequency
E1-04
- G7 Drive 1
- Technical Manual 1
- Warnings and Cautions 2
- Intended Use 3
- Safety Precautions 4
- Always heed the warnings 5
- Warning Information 5
- Registered Trademarks 7
- Contents 8
- Handling Drives 14
- Varispeed G7 Introduction 15
- Confirmations upon Delivery 16
- Drive Model Numbers 17
- Drive Specifications 17
- Component Names 18
- Fig 1.6 Drive Appearance 19
- Open Chassis Drives (IP00) 20
- NEMA Type 1 Drives (IP 20) 21
- Installation Site 23
- Removing the Terminal Cover 25
- Attaching the Terminal Cover 26
- Front Cover 27
- Removing the Front Cover 28
- Mounting the Front Cover 28
- Attaching the Front Cover 30
- Connection Diagram 33
- Connection Diagram 34
- Terminal Block Configuration 35
- Wiring Main Circuit Terminals 36
- Wire Size * Terminal Screw 42
- Main Circuit Configurations 45
- Standard Connection Diagrams 46
- Wiring the Main Circuits 47
- Inductive 50
- Ground Wiring 51
- Digital 54
- Sinking/Sourcing Mode 59
- Control Circuit Wire Sizes 61
- Wiring Checks 61
- Wiring 67
- Wiring the PG-B2 69
- Wiring the PG-D2 70
- Wiring the PG-X2 70
- Wiring Terminal Blocks 71
- PG power supply 72
- Capacitor for momentary 72
- Digital Operator and Modes 74
- Digital Operator 75
- Digital Operator Keys 76
- Drive Mode Indicators 77
- Run Indicator 78
- Stop Indicator 78
- Drive Modes 78
- Drive Mode 80
- Quick Programming Mode 82
- Advanced Programming Mode 83
- U1- 01=60.00Hz 84
- Entry Accepted 84
- Verify Mode 86
- Autotuning Mode 87
- Trial Operation 90
- Trial Operation Procedure 91
- Trial Operation Procedures 92
- Checking the Display Status 93
- Basic Settings 94
- Overview of Settings 96
- Setting the Control Method 97
- Autotuning 98
- IMPORTANT 100
- Application Settings 103
- No-load Operation 103
- Loaded Operation 104
- Password (A1-04 and A1-05) 105
- Adjustment Suggestions 106
- Recommended 107
- User Parameters 112
- User Parameter Descriptions 113
- Description 115
- Control Methods 115
- User Parameter Tables 121
- User-set Parameters: A2 122
- Application Parameters: b 123
- DC Injection Braking: b2 125
- Speed Search: b3 126
- Timer Function: b4 128
- PID Control: b5 128
- Dwell Functions: b6 131
- DROOP Control: b7 131
- Energy Saving: b8 132
- Zero Servo: b9 132
- Autotuning Parameters: C 133
- Motor Slip Compensation: C3 135
- Torque Compensation: C4 136
- Speed Control (ASR): C5 137
- Carrier Frequency: C6 138
- Reference Parameters: d 139
- Reference Limits: d2 141
- Jump Frequencies: d3 141
- Reference Frequency Hold: d4 142
- Torque Control: d5 142
- Field Control: d6 144
- Motor Setup Parameters: E 145
- Parameter 146
- Motor Setup: E2 147
- Motor 2 V/f Pattern: E3 148
- Motor 2 Setup: E4 150
- Option Parameters: F 152
- Analog Reference Card: F2 155
- Digital Reference Card: F3 156
- Analog Monitor Cards: F4 156
- Setting 163
- Function 163
- Analog Inputs: H3 166
- H3-05,H3-09 Settings 168
- MODBUS Communications: H5 170
- Pulse Train I/O: H6 171
- Motor Overload: L1 172
- Power Loss Ridethrough: L2 173
- Stall Prevention: L3 174
- Reference Detection: L4 177
- Fault Restart: L5 178
- Torque Detection: L6 179
- Torque Limits: L7 182
- Hardware Protection: L8 183
- n: Special Adjustments 185
- High-slip Braking: n3 186
- Speed Estimation: n4 187
- Feed Forward: n5 190
- Copy Function: o3 194
- T: Motor Autotuning 195
- U: Monitor Parameters 197
- U1-40= 00000000 201
- Fault Trace: U2 203
- Fault History: U3 205
- Setting Range Unit 207
- Factory Setting 207
- Frequency 212
- Voltage 212
- 208-240Vac Drives 213
- Name Unit Factory Setting 214
- 380-480Vac Drives 215
- Parameter Settings by 218
- Frequency Reference 219
- 3.5 to 13.2 V 221
- Related Parameters 222
- Run Command 224
- Stopping Methods 226
- Accel Time 1 227
- C1-01= 0 010.0Sec 227
- Output frequency 228
- Run command 228
- DC Braking Stop 229
- Coast to Stop with Timer 229
- Using the DC Injection Brake 230
- Using an Emergency Stop 231
- Commands 234
- During Acceleration Function) 237
- Time Chart 238
- Setting Precautions 238
- Deceleration Function) 239
- Setting Example 240
- Frequency reference 243
- Terminal A1 input voltage 243
- Function) 247
- Limiting Minimum Frequency 248
- Improved Operating Efficiency 249
- Slip compensation limit 251
- E1-06: Base frequency 251
- Hunting-prevention Function 254
- Machine Protection 256
- C6-03 ≥ 10.0 kHz: K=3 257
- 5.0 kHz > C6-03: K=1 257
- 200-240 V, 22 kW 258
- 200-240 V, 30 to 75 kW 258
- Detecting Motor Torque 262
- Function Contents (100%) 267
- Motor Overload Protection 268
- Setting Motor Rated Current 269
- Error Code Details 272
- Continuing Operation 274
- Setting Precautions 275
- Speed Search 276
- Speed Search Selection 279
- Estimated Speed Search 279
- Application Precautions 283
- Drive Protection 284
- Input Terminal Functions 286
- Ramp Hold) 288
- Application Precautions 289
- Precautions 290
- (FJOG/RJOG) 294
- (External Fault Function) 295
- Monitor Parameters 296
- Load impedance 300
- Sinking current 300
- External power supply 300
- Individual Functions 301
- Message Format 305
- MODBUS Message Example 306
- Data Tables 308
- Monitor Data 309
- ENTER Command 311
- Error Codes 312
- Slave Not Responding 312
- Self-Diagnosis 313
- Using the Timer Function 314
- Using PID Control 315
- Adjustment 316
- PID Control Methods 319
- PID Input Methods 319
- PID Adjustment Methods 320
- PID Fine Adjustment Methods 320
- PID Control Block 322
- PID Feedback Loss Detection 323
- PID Sleep 323
- Energy-saving 324
- Setting Motor Parameters 325
- Setting the V/f Pattern 328
- E1-03 V/f Pattern Selection 330
- Torque Control 337
- Monitor Function 339
- Torque Reference Adjustment 343
- Motor speed 348
- The proportional gain is low 348
- Droop Control Function 351
- Zero-servo Function 352
- Digital Operator Functions 356
- Disabling the STOP Key 358
- Enter Key 359
- Copying Parameters 360
- A1 - 00=1 361
- Copy Function.) 363
- DATA VERIFYING 364
- VERIFY ERROR 365
- Operation 366
- Using PG Speed Control Card 370
- Setting Number of PG Pulses 370
- Detecting PG Open Circuit 372
- Detecting Motor Overspeed 372
- Using Digital Output Cards 373
- F5-09 Set to 0 375
- F5-09 Set to 1 375
- F5-09 Set to 2 375
- DI-08 Reference Ranges 380
- Troubleshooting 382
- Fault Detection 383
- Alarm Detection 390
- (blinking) 393
- Operation Errors 394
- Errors During Autotuning 396
- If Motor Deceleration is Slow 404
- If the Motor Overheats 405
- Maintenance and 410
- Inspection 410
- Maintenance and Inspection 411
- Periodic Maintenance of Parts 412
- Air flow direction 413
- Fan cover 413
- Removing and Mounting the 415
- Control Circuit Terminal Card 415
- Specifications 416
- Standard Drive Specifications 417
- 4075 4090 4110 418
- 4132 4160 4185 4220 4300 418
- Common Specifications 419
- * Under development 423
- Appendix 424
- Varispeed G7 Control Modes 425
- Load torque (%) 428
- Speed (Hz) 428
- Driving torque 428
- Regenerative torque 428
- Fig 10.1 429
- Fig 10.2 429
- Fig 10.3 429
- Fig 10.4 429
- Selection 430
- Installation 431
- Settings 431
- Handling 432
- Motor Application Precautions 433
- CE Markings 435
- Input Fuses 436
- L1L2L3PE 438
- L1L2L3 T1 T3T2 439
- UL Markings 441
- Conformance to UL Standard 441
- Control Circuit Terminal 442
- Interrupting Rating 442
- Motor Overheat Protection 442
- 0.0 C2-01 443
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