Instruction manual

PARAMETERS
99
Parameter write inhibit selection (Pr. 77)
Pr. 77 "parameter write disable selection"
You can select between write-enable and disable for parameters. This function is used to prevent parameter
values from being rewritten by accident.
Parameter
Number
Factory Setting Setting Range
77 0 0, 1, 2
<Setting>
Pr. 77 Setting Function
0
Write enabled during a stop only.
Parameter values may only be written during a stop in the PU operation mode.
1
Write disabled.
Values of Pr.75, Pr. 77 and Pr. 79 "operation mode selection" may be written.
2
Write enabled even during operation.
Note: 1. The values of the parameters half-tone screened in the parameter list can be set at any time.
(Pr. 72 and Pr. 240 values cannot be set during external operation.)
2. If Pr. 77 = "2", the values of the following parameters cannot be written during operation. Stop
operation when changing their parameter settings.
Parameter
Number
Name
Parameter
Number
Name
23
Stall prevention operation level at
double speed
100 V/F1 (first frequency)
48
Second stall prevention operation
current
101 V/F1 (first frequency voltage)
49
Second stall prevention operation
frequency
102 V/F2 (second frequency)
60 Intelligent mode selection 103 V/F2 (second frequency voltage)
61 Reference current 104 V/F3 (third frequency)
66
Stall prevention operation reduction
starting frequency
105 V/F3 (third frequency voltage)
71 Applied motor 106 V/F4 (fourth frequency)
79 Operation mode selection 107 V/F4 (fourth frequency voltage)
80 Motor capacity 108 V/F5 (fifth frequency)
81 Number of motor poles 109 V/F5 (fifth frequency voltage)
83 Rated motor voltage 135
Commercial power supply-inverter
switch-over sequence output
terminal selection
84 Rated motor frequency 136 MC switch-over interlock time
95 Advanced mode selection 137 Start waiting time
96 Auto tuning setting/status 138
Commercial power supply-inverter
switch-over selection at alarm
occurrence
139
Automatic inverter-commercial
power supply switch-over frequency
3. By setting "1" in Pr. 77, the following clear operations can be inhibited:
·
Parameter clear
·
All clear
·
User clear