Parameter Write Inhibit Selection (Pr. 77) - Mitsubishi Electric FR-F500 Instruction Manual

4.2.35 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
Number Setting
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 "4.1.1 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 and 180 to 186, 190 to 195 cannot be written
during operation. Stop operation when changing their parameter settings.
Parameter
Number
23
48
49
60
61
66
71
79
100
101
102
3. By setting "1" in Pr. 77, the following clear operations can be inhibited:
• Parameter clear
• All clear
• User clear
Setting Range
0, 1, 2
Function
Name
Stall prevention operation level at
double speed
Second stall prevention operation
current
Second stall prevention operation
frequency
Intelligent mode selection
Reference current
Stall prevention operation reduction
starting frequency
Applied motor
Operation mode selection
V/F1 (first frequency)
V/F1 (first frequency voltage)
V/F2 (second frequency)
Parameter
Number
103 V/F2 (second frequency voltage)
104 V/F3 (third frequency)
105 V/F3 (third frequency voltage)
106 V/F4 (fourth frequency)
107 V/F4 (fourth frequency voltage)
108 V/F5 (fifth frequency)
109 V/F5 (fifth frequency voltage)
Commercial power supply-inverter
135 switch-over sequence output
terminal selection
136 MC switch-over interlock time
137 Start waiting time
Commercial power supply-inverter
138 switch-over selection at alarm
occurrence
Automatic inverter-commercial
139
power supply switch-over frequency
180 to 186,
Input / Output signal set
190 to 195
98
PARAMETERS
Name
4