Mitsubishi Electric FR-D720 K Series Instruction Manual page 7

4.14 Energy saving operation ................................................................ 150
4.14.1 Optimum excitation control (Pr. 60) ........................................................................................... 150
4.15 Motor noise, EMI measures, mechanical resonance .................... 151
4.15.1 PWM carrier frequency and Soft-PWM control (Pr. 72, Pr. 240, Pr. 260).................................. 151
4.15.2 Speed smoothing control (Pr. 653) ............................................................................................ 152
4.16 Frequency setting by analog input (terminal 2, 4) ........................ 153
4.16.1 Analog input selection (Pr. 73, Pr. 267) ..................................................................................... 153
4.16.2 Response level of analog input and noise elimination (Pr. 74).................................................. 155
4.16.3 Bias and gain of frequency setting voltage (current)
(Pr. 125, Pr. 126, Pr. 241, C2 (Pr. 902) to C7 (Pr. 905)) ........................................................... 156
4.17 Misoperation prevention and parameter setting restriction ........ 161
4.17.1 Reset selection/disconnected PU detection/PU stop selection (Pr. 75) .................................... 161
4.17.2 Parameter write disable selection (Pr. 77)................................................................................. 164
4.17.3 Reverse rotation prevention selection (Pr. 78) .......................................................................... 165
4.17.4 Extended parameter display (Pr. 160) ....................................................................................... 165
4.17.5 Password function (Pr. 296, Pr. 297)......................................................................................... 166
4.18 Selection of operation mode and operation location ................... 168
4.18.1 Operation mode selection (Pr. 79)............................................................................................. 168
4.18.2 Operation mode at power-ON (Pr. 79, Pr. 340) ......................................................................... 176
4.18.3 Start command source and frequency command source during communication
operation (Pr. 338, Pr. 339, Pr. 551).......................................................................................... 177
4.19 Communication operation and setting .......................................... 181
4.19.1 Wiring and configuration of PU connector ................................................................................. 181
4.19.2 Initial settings and specifications of RS-485 communication
(Pr. 117 to Pr. 120, Pr. 123, Pr. 124, Pr. 549) ........................................................................... 184
4.19.3 Operation selection at communication error occurrence (Pr. 121, Pr. 122, Pr. 502) ................. 185
4.19.4 Communication EEPROM write selection (Pr. 342) .................................................................. 188
4.19.5 Mitsubishi inverter protocol (computer link communication) ...................................................... 189
4.19.6 MODBUS RTU communication specifications
(Pr. 117, Pr. 118, Pr. 120, Pr. 122, Pr. 343, Pr. 502, Pr. 549) ................................................... 201
4.20 Special operation and frequency control ...................................... 213
4.20.1 PID control (Pr. 127 to Pr. 134, Pr. 575 to Pr. 577) ................................................................... 213
4.20.2 Dancer control (Pr. 44, Pr. 45, Pr. 128 to Pr. 134)..................................................................... 221
4.20.3 Regeneration avoidance function (Pr. 665, Pr. 882, Pr. 883, Pr. 885, Pr. 886)......................... 227
4.21 Useful functions ............................................................................. 229
4.21.1 Cooling fan operation selection (Pr. 244) .................................................................................. 229
4.21.2 Display of the lives of the inverter parts (Pr. 255 to Pr. 259) ..................................................... 230
4.21.3 Maintenance timer alarm (Pr. 503, Pr. 504)............................................................................... 234
4.21.4 Current average value monitor signal (Pr. 555 to Pr. 557) ........................................................ 235
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