Parameter Write Inhibit Selection (Pr. 77) - Mitsubishi Electric FR-A520-2.2K Instruction Manual

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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
Factory Setting
Number
77 0
<Setting>
Pr. 77 Setting
Write enabled during a stop only.
0
Parameter values may only be written during a stop in the PU operation mode.
Write disabled.
1
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
Stall prevention operation level at
23
double speed
Second stall prevention operation
48
current
Second stall prevention operation
49
frequency
60 Intelligent mode selection
61 Reference current
Stall prevention operation reduction
66
starting frequency
71 Applied motor
79 Operation mode selection
80 Motor capacity
81 Number of motor poles
83 Rated motor voltage
84 Rated motor frequency
95 Advanced mode selection
96 Auto tuning setting/status
3. By setting "1" in Pr. 77, the following clear operations can be inhibited:
·
Parameter clear
·
All clear
·
User clear
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Setting Range
0, 1, 2
Function
Parameter
Name
Number
100
101
102
103
104
105
106
107
108
109
135
136
137
138
139
99
PARAMETERS
Name
V/F1 (first frequency)
V/F1 (first frequency voltage)
V/F2 (second frequency)
V/F2 (second frequency voltage)
V/F3 (third frequency)
V/F3 (third frequency voltage)
V/F4 (fourth frequency)
V/F4 (fourth frequency voltage)
V/F5 (fifth frequency)
V/F5 (fifth frequency voltage)
Commercial power supply-inverter
switch-over sequence output
terminal selection
MC switch-over interlock time
Start waiting time
Commercial power supply-inverter
switch-over selection at alarm
occurrence
Automatic inverter-commercial
power supply switch-over frequency