Mitsubishi Electric FR-A720-0.4K Instruction Manual page 5

3.1.8 Parameter clear, all parameter clear ....................................................................................... 54
3.1.9 Parameter copy and parameter verification............................................................................. 55
3.2 Before operation .................................................................................................. 57
3.2.1 Simple mode parameter list ..................................................................................................... 57
3.2.2 Overheat protection of the motor by the inverter (Pr. 9) .......................................................... 58
3.2.3 When the rated motor frequency is 50Hz (Pr. 3) .................................................................... 58
3.2.4 Increasing the starting torque (Pr. 0) ...................................................................................... 59
3.2.5 Limiting the maximum and minimum output frequency (Pr. 1, Pr. 2)....................................... 59
3.2.6 Changing acceleration and deceleration time (Pr. 7, Pr. 8) ..................................................... 60
3.2.7 Energy saving operation for fans and pumps (Pr. 14, Pr. 60) ................................................. 60
3.2.8 Selection of the start command and frequency command locations (Pr. 79) .......................... 62
3.2.9 Acquiring large starting torque and low speed torque (Advanced magnetic
flux vector control, Real sensorless vector control) (Pr. 71, Pr. 80, Pr. 81, Pr. 800) ............. 63
3.2.10 Higher accuracy operation using a motor with encoder (Vector control)
(Pr.71, Pr.80, Pr.81, Pr.359, Pr.369, Pr.800) .......................................................................... 66
3.2.11 Exhibiting the best performance of the motor performance (offline auto tuning)
(Pr. 71, Pr. 83, Pr. 84, Pr. 96)
3.2.12 High accuracy operation unaffected by the motor temperature
(online auto tuning) (Pr. 95)
3.2.13 To perform high accuracy/fast response operation (gain adjustment of Real
sensorless vector control and vector control) (Pr. 818 to Pr. 821, Pr. 880) .......................... 76
3.3 Start/stop using the operation panel (PU operation) ............................................ 82
3.3.1 Setting the frequency to operate (example: performing operation at 30Hz) ............................ 82
3.3.2 Using the setting dial like a potentiometer to perform operation. ............................................ 83
3.3.3 Setting the frequency by switches (multi-speed setting) ......................................................... 84
3.3.4 Setting the frequency by analog input (voltage input) ............................................................. 85
3.3.5 Setting the frequency by analog input (current input) .............................................................. 86
3.4 Start and stop using terminals (External operation) ............................................. 87
3.4.1 Setting the frequency by the operation panel (Pr. 79 = 3) ....................................................... 87
3.4.2 Setting the frequency by switches (multi-speed setting) (Pr. 4 to Pr. 6) .................................. 88
3.4.3 Setting the frequency by analog input (voltage input) ............................................................. 89
3.4.4 Changing the output frequency (60Hz, initial value) at the maximum voltage
input (5V, initial value) ............................................................................................................ 90
3.4.5 Setting the frequency by analog input (current input) .............................................................. 91
3.4.6 Changing the output frequency (60Hz, initial value) at the maximum current input
(at 20mA, initial value) ............................................................................................................. 92
3.5 Parameter List...................................................................................................... 93
3.5.1 List of parameters classified by the purpose ........................................................................... 93
3.5.2 Parameter list .......................................................................................................................... 96
4 TROUBLESHOOTING
4.1 Reset method of protective function .................................................................. 137
4.2 List of fault or alarm display ............................................................................... 138
4.3 Causes and corrective actions........................................................................... 139
4.4 Correspondences between digital and actual characters .................................. 153
4.5 Check and clear of the faults history .................................................................. 154
4.6 Check first when you have a trouble .................................................................. 156
4.6.1 Motor does not start............................................................................................................... 156
4.6.2 Motor or machine is making abnormal acoustic noise........................................................... 158
II
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