Mitsubishi Electric FR-E720-008 Instruction Manual page 7

4.14.3 Earth (ground) fault detection at start (Pr. 249) ......................................................................... 171
4.15 Energy saving operation ................................................................ 172
4.15.1 Optimum excitation control (Pr. 60) ........................................................................................... 172
4.16 Motor noise, EMI measures, mechanical resonance .................... 173
4.16.1 PWM carrier frequency and soft-PWM control (Pr. 72, Pr. 240)................................................ 173
4.16.2 Speed smoothing control (Pr. 653) ............................................................................................ 174
4.17 Frequency setting by analog input (terminal 2, 4) ........................ 175
4.17.1 Analog input selection (Pr. 73, Pr. 267) ..................................................................................... 175
4.17.2 Response level of analog input and noise elimination (Pr. 74).................................................. 177
4.17.3 Bias and gain of frequency setting voltage (current)
(Pr. 125, Pr. 126, Pr. 241, C2 (Pr. 902) to C7 (Pr. 905)) ........................................................... 178
4.18 Misoperation prevention and parameter setting restriction ........ 183
4.18.1 Reset selection/disconnected PU detection/PU stop selection (Pr. 75) .................................... 183
4.18.2 Parameter write disable selection (Pr. 77)................................................................................. 186
4.18.3 Reverse rotation prevention selection (Pr. 78) .......................................................................... 187
4.18.4 Extended parameter display and user group function (Pr. 160, Pr. 172 to Pr. 174) .................. 187
4.18.5 Password function (Pr. 296, Pr. 297)......................................................................................... 190
4.19 Selection of operation mode and operation location.................... 193
4.19.1 Operation mode selection (Pr. 79)............................................................................................. 193
4.19.2 Operation mode at power-ON (Pr. 79, Pr. 340) ......................................................................... 203
4.19.3 Start command source and frequency command source during communication
operation (Pr. 338, Pr. 339, Pr. 550, Pr. 551) ............................................................................ 204
4.20 Communication operation and setting .......................................... 210
4.20.1 Wiring and configuration of PU connector ................................................................................. 210
4.20.2 Initial settings and specifications of RS-485 communication
(Pr. 117 to Pr. 120, Pr. 123, Pr. 124, Pr. 549) ........................................................................... 213
4.20.3 Operation selection at communication error occurrence (Pr. 121, Pr. 122, Pr. 502) ................. 214
4.20.4 Communication EEPROM write selection (Pr. 342) .................................................................. 217
4.20.5 Mitsubishi inverter protocol (computer link communication) ...................................................... 218
4.20.6 Modbus-RTU communication specifications
(Pr. 117, Pr. 118, Pr. 120, Pr. 122, Pr. 343, Pr. 502, Pr. 549) ................................................... 231
4.20.7 USB communication (Pr. 547, Pr. 548)...................................................................................... 244
4.21 Special operation and frequency control ...................................... 245
4.21.1 PID control (Pr. 127 to Pr. 134) ................................................................................................. 245
4.21.2 Dancer control (Pr. 44, Pr. 45, Pr. 128 to Pr. 134)..................................................................... 252
4.21.3 Droop control (Pr. 286 to Pr. 287) ............................................................................................. 259
4.21.4 Regeneration avoidance function (Pr. 665, Pr. 882, Pr. 883, Pr. 885, Pr. 886)......................... 260
4.22 Useful functions ............................................................................. 262
4.22.1 Cooling fan operation selection (Pr. 244) .................................................................................. 262
4.22.2 Display of the life of the inverter parts (Pr. 255 to Pr. 259)........................................................ 263
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