IV
4.14 Misoperation prevention and parameter setting restriction ........ 140
4.14.1 Reset selection/disconnected PU detection/PU stop selection (Pr. 75) .................................... 140
4.14.2 Parameter write disable selection (Pr. 77)................................................................................. 143
4.14.3 Reverse rotation prevention selection (Pr. 78) .......................................................................... 144
4.14.4 Extended parameter display (Pr. 160)....................................................................................... 144
4.14.5 Password function (Pr. 296, Pr. 297)......................................................................................... 145
4.15 Selection of operation mode and operation location ................... 147
4.15.1 Operation mode selection (Pr. 79)............................................................................................. 147
4.15.2 Setting the speed by the operation panel .................................................................................. 155
4.15.3 Setting the speed by the operation panel (Pr. 79 = 3)................................................................ 157
4.15.4 Setting the speed by analog input (voltage input / current input)............................................... 158
4.15.5 Operation mode at power-ON (Pr. 79, Pr. 340)......................................................................... 159
4.15.6 Start command source and speed command source during communication
operation (Pr. 338, Pr. 339, Pr. 551).......................................................................................... 160
4.16 Communication operation and setting .......................................... 164
4.16.1 Wiring and configuration of PU connector ................................................................................. 164
4.16.2 Initial settings and specifications of RS-485 communication
(Pr. 117 to Pr. 120, Pr. 123, Pr. 124, Pr. 549) ........................................................................... 167
4.16.3 Operation selection at communication error occurrence
(Pr. 121, Pr. 122, Pr. 502, Pr. 779)............................................................................................ 168
4.16.4 Communication EEPROM write selection (Pr. 342) .................................................................. 173
4.16.5 Mitsubishi inverter protocol (computer link communication) ...................................................... 174
4.16.6 Modbus-RTU communication specifications
(Pr. 117, Pr. 118, Pr. 120, Pr. 122, Pr. 343, Pr. 502, Pr. 549, Pr. 779)...................................... 186
4.17 Special operation and speed control ............................................ 199
4.17.1 PID control (Pr. 127 to Pr. 134, Pr. 553, Pr. 554, Pr. 575 to Pr. 577, C42 to C45).................... 199
4.17.2 Regeneration avoidance function (Pr. 665, Pr. 882, Pr. 883, Pr. 885, Pr. 886)......................... 211
4.18 Useful functions ............................................................................. 213
4.18.1 Cooling fan operation selection (Pr. 244) .................................................................................. 213
4.18.2 Display of the lives of the drive unit parts (Pr. 255 to Pr. 259)................................................... 214
4.18.3 Maintenance timer alarm (Pr. 503, Pr. 504)............................................................................... 218
4.18.4 Current average value monitor signal (Pr. 555 to Pr. 557) ........................................................ 219
4.18.5 Free parameter (Pr. 888, Pr. 889) ............................................................................................. 221
4.18.6 Initiating a fault (Pr. 997)............................................................................................................ 221
4.18.7 Batch setting Mitsubishi HMI (GOT) connection parameters (Pr. 999)...................................... 222
4.19 Setting the parameter unit and operation panel........................... 224
4.19.1 RUN key rotation direction selection (Pr. 40)............................................................................. 224
4.19.2 PU display language selection (Pr. 145).................................................................................... 224
4.19.3 Operation panel speed setting/key lock selection (Pr. 161)....................................................... 225
4.19.4 Magnitude of speed change setting (Pr. 295)............................................................................ 228
