Справочник Пользователя для Mitsubishi Electronics FR-A700
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setting restriction
4
4.22.2 Parameter write selection (Pr. 77)
(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 shaded parameters in the parameter list (page 71) can always be written, regardless of the operation mode and
operating status. However, Pr. 72 PWM frequency selection, Pr. 240 Soft-PWM operation selection and Pr. 275 Stop-on
contact excitation current low-speed multiplying factor can be written during operation in the PU operation mode, but
cannot be written in External operation mode.
(3) Write parameters during operation (setting "2")
⋅ Parameters can always be written.
⋅ The following parameters cannot be written during operation if Pr. 77 = "2". Stop operation when changing their
parameter settings.
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 values from being rewritten by misoperation.
Parameter
Number
Name
Initial Value
Setting
Range
Description
77
Parameter write selection
0
0
Write is enabled only during a stop.
1
Parameter write is not enabled.
2
Parameter write is enabled in any operation
mode regardless of operating status.
mode regardless of operating status.
Pr. 77 can be always set independently of the operation mode and operating status.
(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
even if Pr. 77 = "1".
Parameter
Number
Name
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
♦ Parameters referred to ♦
Pr. 79 Operation mode selection
Refer to page 313
Parameter
Number
Name
23
Stall prevention operation level compensation
factor at double speed
factor at double speed
48
Second stall prevention operation current
49
Second stall prevention operation frequency
60
Energy saving control selection
61
Reference current
66
Stall prevention operation reduction starting
frequency
frequency
71
Applied motor
79
Operation mode selection
80
Motor capacity
81
Number of motor poles
82
Motor excitation current
83
Rated motor voltage
84
Rated motor frequency
90 to 94
(Motor constants)
95
Online auto tuning selection
96
Auto tuning setting/status
100 to 109
(Adjustable 5 points V/F parameter)
135 to 139
(Parameter for electronic bypass sequence)
178 to 196
(I/O terminal function selection)
291
Pulse train I/O selection
292
Automatic acceleration/deceleration
293
Acceleration/deceleration separate selection
329
Digital input unit selection
(Parameter for the plug-in option FR-A7AX)
(Parameter for the plug-in option FR-A7AX)
450
Second applied motor
451
Second motor control method selection
453
Second motor capacity
454
Number of second motor poles
455
Second motor excitation current
456
Rated second motor voltage
457
Rated second motor frequency
458 to 462
(Second motor constant)
463
Second motor auto tuning setting/status
541
Frequency command sign selection (CC-Link)
(Parameter for the plug-in option FR-A7NC/
FR-A7NCE)
(Parameter for the plug-in option FR-A7NC/
FR-A7NCE)
574
Second motor online auto tuning
800
Control method selection
819
Easy gain tuning selection
858
Terminal 4 function assignment
859
Torque current
860
Second motor torque current
868
Terminal 1 function assignment
Parameter
Number
Name