Mitsubishi Electric FR-F820-00077 Instruction Manual page 246

(E) Environment setting parameters
Disabling parameter write (Pr. 77 = "1")
● Parameter write, parameter clear and all parameter clear are disabled. (Parameter read is enabled.)
● The following parameters can be written even if Pr. 77 = "1".
Pr.
22
75
77
79
160
296
Tab. 5-28:
Writing during operation is disabled. To change the parameter setting value, stop the operation.
5 - 74
Name
Stall prevention operation level
Reset selection/disconnected PU
detection/PU stop selection
Parameter write selection
Operation mode selection
User group read selection
Password lock level
Parameters, that can be written even if Pr. 77 = 1
Pr. Name
297 Password lock/unlock
345, 346 (DeviceNet communication)
496, 497 (Remote output)
656 to 659 (Analog remote output)
997 Fault initiation
Parameters