Mitsubishi Electric FR-A720-0.4K Instruction Manual page 96

(Pr. 125, Pr. 126, Pr. 241, C2(Pr. 902) to C7(Pr. 905), C12(Pr. 917) to C15(Pr. 918)) ........................................ 280
4.21.6 Bias and gain of torque (magnetic flux) setting voltage (current)
(Pr. 241, C16(Pr. 919) to C19(Pr. 920), C38 (Pr. 932) to C41 (Pr. 933)) ............................................................ 285
4.22 Misoperation prevention and parameter setting restriction
4.22.1 Reset selection/disconnected PU detection/PU stop selection (Pr. 75) ................................................................ 290
4.22.2 Parameter write diable selection (Pr. 77) ................................................................................................................ 292
4.22.3 Reverse rotation prevention selection (Pr. 78)........................................................................................................ 293
4.22.4 Display of applied parameters and user group function (Pr. 160, Pr. 172 to Pr. 174) .......................................... 293
4.23 Selection of operation mode and operation location
4.23.1 Operation mode selection (Pr. 79)........................................................................................................................... 295
4.23.2 Operation mode at power on (Pr. 79, Pr. 340)........................................................................................................ 303
4.23.3 Operation command source and speed command source during
communication operation (Pr. 338, Pr. 339, Pr. 550, Pr. 551) ............................................................................... 304
4.24 Communication operation and setting
4.24.1 Wiring and configuration of PU connector............................................................................................................... 309
4.24.2 Wiring and arrangement of RS-485 terminals ........................................................................................................ 311
4.24.3 Initial settings and specifications of RS-485 communication
(Pr. 117 to Pr. 124, Pr. 331 to Pr. 337, Pr. 341, Pr. 549)........................................................................................ 314
4.24.4 Communication EEPROM write selection (Pr. 342)............................................................................................... 315
4.24.5 Mitsubishi inverter protocol (computer link communication)................................................................................... 316
4.24.6 Modbus-RTU communication specifications (Pr. 331, Pr. 332, Pr. 334, Pr. 343,
Pr. 549)...................................................................................................................................................................... 327
4.24.7 USB communication (Pr. 547, Pr. 548)................................................................................................................... 340
4.25 Special operation and frequency control
4.25.1 PID control (Pr. 127 to Pr. 134, Pr. 575 to Pr. 577) ................................................................................................ 341
4.25.2 Commercial power supply-inverter switchover function (Pr. 57, Pr. 58, Pr. 135 to
Pr. 139, Pr. 159)........................................................................................................................................................ 349
4.25.3 Load torque high speed frequency control (Pr. 4, Pr. 5, Pr. 270 to Pr. 274) ......................................................... 354
4.25.4 Droop control (Pr. 286 to Pr. 288) ......................................................................................................................... 356
4.25.5 Frequency setting by pulse train input (Pr. 291, Pr. 384 to Pr. 386) ...................................................................... 358
4.25.6 Encoder feedback control (Pr. 144, Pr. 285, Pr. 359, Pr. 367 to Pr. 369) ............................................................ 361
4.25.7 Regeneration avoidance function (Pr. 665, Pr. 882 to Pr. 886) ............................................................................. 363
4.26 Useful functions
4.26.1 Cooling fan operation selection (Pr. 244)................................................................................................................ 365
4.26.2 Display of the life of the inverter parts (Pr. 255 to Pr. 259)..................................................................................... 366
4.26.3 Maintenance timer alarm (Pr. 503, Pr. 504)............................................................................................................ 368
4.26.4 Current average value monitor signal (Pr. 555 to Pr. 557)..................................................................................... 369
4.26.5 Free parameter (Pr. 888, Pr. 889) ........................................................................................................................... 371
4.27 Setting of the parameter unit and operation panel
4.27.1 PU display language selection (Pr. 145) ................................................................................................................. 372
4.27.2 Operation panel frequency setting/key lock operation selection (Pr. 161) ............................................................ 372
4.27.3 Buzzer control (Pr. 990) ........................................................................................................................................... 374
4.27.4 PU contrast adjustment (Pr. 991) ............................................................................................................................ 374
4.28 Parameter clear
4.29 All parameter clear
4.30 Parameter copy and parameter verification
4.30.1 Parameter copy ........................................................................................................................................................ 377
4.30.2 Parameter verification .............................................................................................................................................. 379
4.31 Check and clear of the alarm history
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