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Misoperation prevention and parameter setting restriction
5.17.2 Parameter write disable selection (Pr. 77)
(1) Write parameters only during stop (setting "0" initial value)
Parameters can be written only during a stop.
The shaded parameters in the parameter list (page 78) 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 when the inverter is running in the PU operation mode, but
cannot be written in the Network operation mode.
(2) Inhibit parameter write (setting "1")
(3) Write parameters during operation (setting "2")
Parameters can always be written.
The following prameters cannot be written when the inverter is running if Pr. 77 = "2". Stop the inverter 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
Number
Name Initial Value Setting Range Description
77
Parameter write selection
0
0 Write is enabled only during a stop.
1 Parameter can not be written.
2
Parameter write is enabled in any operation
mode regardless of operation status.
The above parameters can be set when Pr. 160 User group read selection = "0". (Refer to page 167)
Pr. 77 can be set anytime regardless of the operation mode or the operation status. However, it cannot be changed through FL remote
communication.
Parameter write is not enabled.
(Read 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". (Note that the Pr.77 setting cannot be changed through
FL remote communication.)
Parameter
Number
Name
22 Stall prevention operation level
75 Reset selection/PU stop selection
77 Parameter write selection
160 User group read selection
296 Password lock level
297 Password lock/unlock
Parameter
Number
Name
23
Stall prevention operation level compensation
factor at double speed
40 RUN key rotation direction selection
48 Second stall prevention operation current
60 Energy saving control selection
61 Reference current
66
Stall prevention operation reduction starting
frequency
71 Applied motor
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)
96 Auto tuning setting/status
277 Stall prevention operation current switchover
292 Automatic acceleration/deceleration
293 Acceleration/deceleration separate selection
298 Frequency search gain
450 Second applied motor
800 Control method selection
859 Torque current
Parameter
Number
Name