Parameter Write Selection (Pr. 77) - Mitsubishi Electric FR-F720P-0.75K to 110K Instruction Manual

Fr-f700p series
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Misoperation prevention and parameter
setting restriction

4.18.2 Parameter write selection (Pr. 77)

You can select whether write to various parameters can be performed or not. Use this function to prevent
parameter values from being rewritten by misoperation.
Parameter
Number
77
Parameter write selection
The above parameters can be set when Pr. 160 User group read selection = "0". (Refer to page 201.)
This parameter allows its setting to be changed during operation in any operation mode even if "0 (initial value) or 1" is set in Pr. 77 Parameter write
selection.
(1) Write parameters only at a stop (setting "0", initial value)
⋅ Parameters can be written only during a stop in the PU operation mode.
⋅ The parameters marked in the parameter list (page 64)
mode and operating status. However, Pr. 72 PWM frequency selection and Pr. 240 Soft-PWM operation selection can be
written during operation in the PU operation mode, but cannot be written in External operation mode.
(2) Disable parameter write (setting "1")
⋅ Parameter write is not enabled. (Reading is
enabled.)
⋅ Parameter clear and all parameter clear cannot
be performed, either.
⋅ The parameters given on the right can be
written if Pr. 77 = "1".
(3) Write parameters during operation
(setting "2")
⋅ Parameters can always be written.
⋅ The parameters given on the right cannot be
written during operation if Pr. 77 = "2". Stop
operation when changing their parameter
settings.
♦ Parameters referred to ♦
Pr. 79 Operation mode selection
200
Name
Initial Value
Refer to page 206
Setting
Range
0
Write is enabled only during a stop.
1
Parameter write is not enabled.
0
Parameter write is enabled in any operation
2
mode regardless of operating status.
can always be written, regardless of the operation
Parameter
Number
22
Stall prevention operation level
75
Reset selection/disconnected PU detection/PU stop selection
77
Parameter write selection
79
Operation mode selection
160
User group read selection
296
Password lock level
297
Password lock/unlock
997
Fault initiation
Parameter
Number
Stall prevention operation level compensation factor at
23
double speed
48
Second stall prevention operation current
49
Second stall prevention operation frequency
60
Energy saving control selection
66
Stall prevention operation reduction starting frequency
71
Applied motor
79
Operation mode selection
80
Motor capacity
90
Motor constant (R1)
100 to 109
(Adjustable 5 points V/F parameter)
135
Electronic bypass sequence selection
136
MC switchover interlock time
137
Start waiting time
138
Bypass selection at a fault
Automatic switchover frequency from inverter to bypass
139
operation
178 to 196
(I/O terminal function selection)
Digital input unit selection (Parameter for the plug-in
329
option FR-A7AX)
800
Control method selection
998
IPM parameter initialization
999
Automatic parameter setting
Description
Name
Name

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