Mitsubishi Electric FR-E700 Instruction Manual Page 125
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122
Adjustment of the output torque (current) of the motor
(5) Setting of stall prevention operation in high frequency range (Pr. 22, Pr. 23, Pr. 66)
During high-speed operation above the rated motor frequency, acceleration may not be made because the motor current
does not increase. If operation is performed in a high frequency range, the current at motor lockup becomes smaller than
the rated output current of the inverter, and the protective function (OL) is not executed even if the motor is at a stop.
To improve the operating characteristics of the motor in this case, the stall prevention level can be reduced in the high
frequency range. This function is effective for performing operation up to the high-speed range on a centrifugal separator
etc. Normally, set 60Hz in Pr. 66 and 100% in Pr. 23.
Formula for stall prevention operation level
By setting "9999" (initial value) in Pr. 23
Stall prevention operation level compensation factor at double speed, the stall
prevention operation level is constant at the Pr. 22
setting up to 400Hz.
(6) Set two types of stall prevention operation levels (Pr. 48)
Turning RT signal ON makes Pr. 48 Second stall prevention operation current valid.
To input the RT signal to a virtual terminal of CC-Link communication, set "3" in one of Pr. 180 to Pr. 184 (input terminal
function selection).
Stall prevention operation level
in high frequency range (%)
=A + B × [
Pr. 22 - A
] × [
Pr. 23 - 100
]
Pr. 22 - B
100
However, A =
Pr. 66 (Hz) × Pr. 22 (%)
,B=
Pr. 66 (Hz) × Pr. 22 (%)
Output frequency (Hz)
400Hz
NOTE
Changing the assignment of a virtual terminal of CC-Link communication with Pr. 180 to Pr. 184 (input terminal function
selection) may affect other functions. Set parameters after confirming the function of each virtual terminal.
The RT signal acts as the second function selection signal and makes the other second functions valid.
(Refer to page 165)
Output frequency (Hz)
Pr. 22
When Pr. 23 = 9999
Pr. 66
400Hz
Stall prevention operation
level (%)
Stall prevention operation level
as set in Pr. 23
When Pr. 23 = "9999", the stall prevention
operation level is as set in Pr. 22 to 400Hz.
Output frequency (Hz)
Setting example
30
22.5
0 10060 200150 300 400
45
60
90
150
Stall prevention
operation level
(%)
(Pr. 22 = 150%, Pr. 23 = 100%, Pr. 66 = 60Hz)
- FR-E720-0.1KNC to 15KNC 1
- FR-E740-0.4KNC to 15KNC 1
- FR-E720S-0.1KNC to 2.2KNC 1
- 1. Electric Shock Prevention 2
- 2. Fire Prevention 2
- 3.Injury Prevention 2
- CONTENTS 4
- 5 PARAMETERS 79 6
- 6 TROUBLESHOOTING 231 8
- 8 SPECIFICATIONS 265 9
- APPENDIX 273 10
- 1 OUTLINE 12
- E740 2.2 13
- (Refer to page 266) 14
- (Refer to page 4) 14
- (Refer to page 40) 14
- (Refer to page 220) 14
- 1.2.1 Peripheral devices 15
- MCCB INV 15
- 1.3.1 Front cover 16
- 1) 2) 3) 17
- 1.3.2 Wiring cover 18
- (1) Temperature 19
- (2) Humidity 19
- (3) Dust, dirt, oil mist 20
- (6) Highland 20
- (7) Vibration, impact 20
- ∗1, ∗2 ∗1∗1, ∗2 22
- (2) Above inverter 23
- 2 WIRING 24
- 2.1 Wiring 25
- Three-phase 200V class 26
- Three-phase 400V class 27
- Single-phase 200V class 27
- (1) Applicable cable size 28
- Inverter 29
- 500m or less 30
- 300m+300m=600m 30
- (1) Input signal 31
- (2) Output signal 31
- (3) Communication 31
- 0 to 0.5m 32
- (4) Wiring instructions 33
- 2.3.4 Safety stop function 35
- ∗3 SAFE2∗3 36
- (0.4K or higher) 37
- To the brake unit 39
- To a resistor 39
- 1/L1 5/L3 39
- 2/T1 6/T3 39
- Remove the jumper 40
- PRECAUTIONS FOR USE 42
- OF THE INVERTER 42
- 3.1 EMC and leakage currents 43
- EMC and leakage currents 44
- Noise propagated through 45
- Noise from earthing 45
- (grounding) cable 45
- 3.1.3 Power supply harmonics 47
- Single-phase power input 50
- Measures 52
- Positive logic Negative logic 56
- CC-LINK COMMUNICATION 58
- FUNCTION 58
- 4.2 CC-Link version 59
- QJ61BT11N 60
- *2 FR-E700-NC 61
- Model Manufacturer 62
- (4) Crimping the plug cover 63
- 4.4 Function overview 65
- Function overview 66
- 4.5 I/O signal list 67
- I/O signal list 68
- (1) Remote I/O (32 points) 70
- (2) Remote register 70
- Details of I/O signals 71
- *1 0.01Hz/1 77
- Programming examples 78
- : ON, : OFF, : Flicker 86
- Running frequency 91
- Output current 91
- Output voltage 91
- (Refer to page 82) 92
- (Refer to page 229) 92
- 5.1.4 Setting dial push 94
- 113 0 00 80 0 95
- 135 707 87 0 95
- 135 8 08 88 0 95
- 154 12 0C 8C 0 95
- 135 44 2C AC 0 96
- 90, 91, 93 98
- 181190, 191, 193 98
- 90, 91, 95 98
- 181 190, 191, 195 98
- 90, 91, 93 99
- 181 190, 191, 193 99
- Parameter listParameter list 100
- PARAMETERS 100
- Selection of operation mode 106
- Refer to page 196 107
- Refer to page 224 107
- ∗ Continued 112
- ∗1 Allowed Disallowed 113
- ∗2 Allowed Allowed 113
- 5.5 Control mode 114
- Control mode 115
- Test run 118
- Load torque 119
- (1) Block diagram 123
- (Refer to page 165) 125
- Limiting the output frequency 127
- 5.8 V/F pattern 129
- V/F pattern 130
- 14 Load pattern selection 131
- Refer to page 163 134
- Remote function selection 135
- Refer to page 135 137
- Pr. 180 to Pr. 184 137
- 13 Starting frequency 141
- 571 Holding time at a start 141
- Operation time (min) 145
- Operation time (s) 145
- (1) Set the motor to be used 147
- Parameter 149
- ∗1 Direct Input Value ∗2 150
- (2) Setting 151
- Flickering 152
- Error Cause Remedy 153
- Iq =torque current, I 155
- =rated current, I 155
- =no load current 155
- CAUTION 158
- Refer to page 167 159
- 250 Stop selection 160
- (1) Operation example 161
- (4) Protective functions 165
- Parameters referred to 165
- Refer to 167
- Refer to page 157) 168
- Pr.250 Stop selection 168
- Refer to page 157 168
- (1) Output current detection 175
- Refer to page 167 176
- ∗1 Machine speed ∗1 178
- ∗1, ∗2 1h 23 179
- (terminal Y0) 181
- Center line is always ON 181
- Pr. 37 Speed display 182
- Refer to page 175 182
- Retry failure example 191
- Retry success example 191
- 5.17 Energy saving operation 194
- (1) Reset selection 197
- (2) PU stop selection 197
- Parameter write selection 199
- Refer to page 197 203
- 15 Jog frequency 204
- (2) PID action overview 207
- (7) Adjustment procedure 211
- (8) Calibration example 211
- (1) Droop control 213
- Pr. 8 Deceleration time 215
- Refer to page 135 215
- 5.21 Useful functions 216
- Useful functions 217
- Pr. 503 Maintenance timer 222
- Refer to page 217 222
- USB cable 223
- USB connector 223
- A connector 224
- Connector for amplifier 224
- 888 Free parameter 1 225
- 889 Free parameter 2 225
- When Pr. 295 = "1" 229
- 1 click 1 click 1 click 229
- Setting Description 230
- (2) Clearing procedure 233
- TROUBLESHOOTING 234
- Causes and corrective actions 237
- 6.5.1 Motor does not start 247
- PRECAUTIONS FOR 254
- MAINTENANCE AND INSPECTION 254
- 7.1.1 Daily inspection 255
- 7.1.2 Periodic inspection 255
- Inspection items 256
- 7.1.6 Cleaning 258
- 7.1.7 Replacement of parts 258
- Fan connection 259
- Fan cover 259
- AIR FLOW 260
- Three-phase 262
- To the motor 262
- Three-phase power input 262
- 7.2.1 Measurement of powers 264
- 7.2.3 Measurement of currents 265
- 7.2.8 Pressure test 266
- SPECIFICATIONS 268
- 8.1 Rating 269
- SPECIFICATIONS 270
- 8.2 Common specifications 271
- Outline dimension drawings 272
- APPENDIX 276
- Item FR-E500 (N) FR-E700 (NC) 277
- Appendix 3 Index 279
- REVISIONS 283
- E700-NC Series 284
- Instruction Manual Supplement 284
- General precaution 285
- Motor overload protection 285
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