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IV
CONTENTS
4.14.1 Optimum excitation control (Pr. 60)........................................................................................... 147
4.15 Motor noise, EMI measures, mechanical resonance.................... 148
4.15.1 PWM carrier frequency and Soft-PWM control (Pr. 72, Pr. 240, Pr. 260) ................................. 148
4.15.2 Speed smoothing control (Pr. 653)............................................................................................ 149
4.16 Frequency setting by analog input (terminal 2, 4) ....................... 150
4.16.1 Analog input selection (Pr. 73, Pr. 267)..................................................................................... 150
4.16.2 Response level of analog input and noise elimination (Pr. 74).................................................. 152
4.16.3 Bias and gain of frequency setting voltage (current)
(Pr. 125, Pr. 126, Pr. 241, C2 (Pr. 902) to C7 (Pr. 905)) ........................................................... 153
4.17 Misoperation prevention and parameter setting restriction........ 158
4.17.1 Reset selection/disconnected PU detection/PU stop selection (Pr. 75) .................................... 158
4.17.2 Parameter write disable selection (Pr. 77)................................................................................. 161
4.17.3 Reverse rotation prevention selection (Pr. 78) .......................................................................... 162
4.17.4 Extended parameter display (Pr. 160)....................................................................................... 162
4.17.5 Password function (Pr. 296, Pr. 297)......................................................................................... 163
4.18 Selection of operation mode and operation location ................... 165
4.18.1 Operation mode selection (Pr. 79)............................................................................................. 165
4.18.2 Operation mode at power-on (Pr. 79, Pr. 340) .......................................................................... 175
4.18.3 Start command source and frequency command source during communication
operation (Pr. 338, Pr. 339, Pr. 551) ......................................................................................... 176
4.19 Communication operation and setting ......................................... 180
4.19.1 Wiring and configuration of PU connector ................................................................................. 180
4.19.2 Initial settings and specifications of RS-485 communication
(Pr. 117 to Pr. 120, Pr. 123, Pr. 124, Pr. 549) ........................................................................... 183
4.19.3 Operation selection at communication error occurrence (Pr. 121, Pr. 122, Pr. 502)................. 184
4.19.4 Communication EEPROM write selection (Pr. 342) .................................................................. 187
4.19.5 Mitsubishi inverter protocol (computer link communication)...................................................... 188
4.19.6 Modbus RTU communication specifications
(Pr. 117, Pr. 118, Pr. 120, Pr. 122, Pr. 343, Pr. 502, Pr. 549) ................................................... 200
4.20 Special operation and frequency control ..................................... 212
4.20.1 PID control (Pr. 127 to Pr. 134, Pr. 575 to Pr. 577) ................................................................... 212
4.20.2 Dancer control (Pr. 44, Pr. 45, Pr. 128 to Pr. 134) .................................................................... 220
4.20.3 Regeneration avoidance function (Pr. 665, Pr. 882, Pr. 883, Pr. 885, Pr. 886)......................... 226
4.21 Useful functions ............................................................................ 228
4.21.1 Cooling fan operation selection (Pr. 244) .................................................................................. 228
4.21.2 Display of the life of the inverter parts (Pr. 255 to Pr. 259)........................................................ 229
4.21.3 Maintenance timer alarm (Pr. 503, Pr. 504) .............................................................................. 233
4.21.4 Current average value monitor signal (Pr. 555 to Pr. 557)........................................................ 234
4.21.5 Free parameter (Pr. 888, Pr. 889) ............................................................................................. 236