Mitsubishi Electric FR-A700 EC, Instruction Manual

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Misoperation prevention and parameter setting restriction Parameter
6 - 408
6.21.2 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.
Pr. 77 can be always set independently of the operation mode and operation status.
Write parameters only at a stop (Pr. 77 = 0)
Parameters can be written only during a stop in the PU operation mode.
The half-tone screened parameters in the parameter list (Tab. 6-1) can always be written,
regardless of the operation mode and operation status. However, Pr. 72 "PWM frequency selec-
tion" and Pr. 240 "Soft-PWM operation selection" can be written during operation in the PU oper-
ation mode, but cannot be written in external operation mode.
Disable parameter write (Pr. 77 = 1)
Parameter write is not enabled. (Reading is enabled.)
Parameter clear and all parameter clear cannot be performed, either.
The parameters given below can be written if Pr. 77 = 1.
Pr.
No.
Name
Initial
Value
Setting
Range
Description Parameters referred to
Refer to
Section
77
Parameter write selection 0
0 Write is enabled only during a stop.
79 Operation mode
selection 6.22.1
1 Parameter write is not enabled.
2
Parameter write is enabled in any opera-
tion mode regardless of operation status.
Parameter 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
Tab. 6-116: Parameters that can be written even if Pr. 77 = 1