Parameter Write Disable Selection (Pr. 77) - Mitsubishi Electric FR-D720-0.2K-G Instruction Manual

Misoperation prevention and parameter setting restriction

4.15.2 Parameter write disable 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 parameter can be set when Pr. 160 Extended function display selection = "0". (Refer to page 161.)
Pr. 77 can always be set independently from the operation mode and operation status.
(1) Write parameters only during 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 54) can always be written regardless of the operation mode and
operating status.
(2) Inhibit parameter write (setting " 1 " )
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 even if Pr.
77 = "1".
(3) Write parameters during operation (setting "2")
Parameters can always be written.
The following parameters cannot be written when the drive unit is running even if Pr. 77 = "2". Stop the drive unit when
changing their parameter settings.
Parameter
Number
40 RUN key rotation direction selection
48 Second stall prevention operation current
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 speed
90, 92, 93 (Motor constant)
96 Auto tuning setting/status
178 to 182 (input terminal function selection)
190, 192 (output terminal function selection)
561 PTC thermistor protection level
643 Voltage compensation amount setting
658 Wiring resistance
160
Name Initial Value
Name
Setting Range
0
1
0
2
Parameter
Number
22
75
77
79
160
296
297
997
Parameter
Number
672, 702,
706, 707,
711, 712, (PM motor tuning)
717, 721, 724
to 726, 859
736 Electromagnetic brake interlock time
785 PM control torque boost
795 DC brake torque boost
800 Control method selection
998 PM parameter initialization
999 Automatic parameter setting
Description
Write is enabled only during stop.
Parameter cannot be written.
Parameter write is enabled in any operation
mode regardless of operation status.
Name
Stall prevention operation level
Reset selection/disconnected PU detection/
PU stop selection
Parameter write selection
Operation mode selection
Extended function display selection
Password lock level
Password lock/unlock
Fault initiation
Name