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4.13 Operation setting at fault occurrence 159
4.13.1 Retry function (Pr. 65, Pr. 67 to Pr. 69).................................................................................................................... 159
4.13.2 Fault code output selection (Pr. 76)......................................................................................................................... 161
4.13.3 Input/output phase loss protection selection (Pr. 251, Pr. 872).............................................................................. 162
4.14 Energy saving operation and energy saving monitor 163
4.14.1 Energy saving control and Optimum excitation control (Pr. 60)............................................................................. 163
4.14.2 Energy saving monitor (Pr. 891 to Pr. 899)............................................................................................................. 164
4.15 Motor noise, EMI measures, mechanical resonance 169
4.15.1 PWM carrier frequency and Soft-PWM control (Pr. 72, Pr. 240, Pr. 260) ............................................................. 169
4.15.2 Speed smoothing control (Pr. 653, Pr. 654)............................................................................................................ 170
4.16 Frequency setting by analog input (terminal 1, 2, 4) 171
4.16.1 Analog input selection (Pr. 73, Pr. 267)................................................................................................................... 171
4.16.2 Analog input compensation (Pr. 73, Pr. 242, Pr. 243, Pr. 252, Pr. 253)................................................................ 175
4.16.3 Response level of analog input and noise elimination (Pr. 74) .............................................................................. 176
4.16.4 Bias and gain of frequency setting voltage (current)
(Pr. 125, Pr. 126, Pr. 241, C2(Pr. 902) to C7(Pr. 905))........................................................................................... 177
4.16.5 4mA input check of current input (Pr. 573, Pr. 777, Pr. 778).................................................................................. 182
4.17 Misoperation prevention and parameter setting restriction 186
4.17.1 Reset selection/disconnected PU detection/PU stop selection (Pr. 75) ................................................................ 186
4.17.2 Parameter write selection (Pr. 77) ........................................................................................................................... 189
4.17.3 Reverse rotation prevention selection (Pr. 78)........................................................................................................ 190
4.17.4 Display of applied parameters and user group function (Pr. 160, Pr. 172 to Pr. 174)........................................... 190
4.17.5 Password function (Pr. 296, Pr. 297)....................................................................................................................... 192
4.18 Selection of operation mode and operation location 195
4.18.1 Operation mode selection (Pr. 79)........................................................................................................................... 195
4.18.2 Operation mode at power ON (Pr. 79, Pr. 340) ...................................................................................................... 203
4.18.3 Start command source and speed command source during
communication operation (Pr. 338, Pr. 339, Pr. 550, Pr. 551)................................................................................ 204
4.19 Communication operation and setting 209
4.19.1 Wiring and configuration of PU connector............................................................................................................... 209
4.19.2 Wiring and arrangement of RS-485 terminals......................................................................................................... 211
4.19.3 Initial settings and specifications of RS-485 communication
(Pr. 117 to Pr. 124, Pr. 331 to Pr. 337, Pr. 341, Pr. 549)........................................................................................ 214
4.19.4 Communication EEPROM write selection (Pr. 342)............................................................................................... 216
4.19.5 Operation selection at communication error (Pr.502, Pr.779)................................................................................ 216
4.19.6 Mitsubishi inverter protocol (computer link communication)................................................................................... 219
4.19.7 Modbus-RTU communication specifications
(Pr. 331, Pr. 332, Pr. 334, Pr. 343, Pr. 502, Pr. 539, Pr. 549, Pr.779)................................................................... 232
4.19.8 BACnet MS/TP protocol........................................................................................................................................... 247
4.19.9 Operation by PLC function
(Pr. 414, Pr. 415, Pr. 498, Pr. 506 to Pr. 515, Pr. 826 to Pr. 865).......................................................................... 260
4.20 PID control 261
4.20.1 Outline of PID control (Pr. 127 to Pr. 134, Pr. 241, Pr. 553, Pr. 554,
Pr. 575 to Pr. 577)..................................................................................................................................................... 261
4.20.2 Bias and gain calibration for PID displayed values
(Pr. 241, Pr. 759, C42(Pr. 934) to C45(Pr. 935))..................................................................................................... 273
4.20.3 Pre-charge function (Pr.760 to Pr. 769)................................................................................................................... 275
4.20.4 Second PID function (Pr.753 to Pr. 758, Pr.765 to Pr.769).................................................................................... 281
4.20.5 Advanced PID function (pump function) (Pr. 554, Pr. 575 to Pr. 591)................................................................... 283
4.21 Special operation and frequency control 293
4.21.1 Bypass-inverter switchover function (Pr. 57, Pr. 58, Pr. 135 to Pr. 139, Pr. 159).................................................. 293
4.21.2 Regeneration avoidance function (Pr. 665, Pr. 882 to Pr. 886).............................................................................. 298
4.22 Useful functions 300
4.22.1 Cooling fan operation selection (Pr. 244) ................................................................................................................ 300
4.22.2 Display of the life of the inverter parts (Pr. 255 to Pr .259)..................................................................................... 301
4.22.3 Maintenance timer alarm (Pr. 503, Pr. 504)............................................................................................................ 304
4.22.4 Current average value monitor signal (Pr. 555 to Pr. 557)..................................................................................... 305
4.22.5 Free parameter (Pr. 888, Pr. 889)............................................................................................................................ 307
4.22.6 Initiating a fault (Pr.997)............................................................................................................................................ 308