FR-A701 INSTRUCTION MANUAL (Applied) - Automation Systems ...

Misoperation prevention and parametersetting restriction4.22.2 Parameter write selection (Pr. 77)You can select whether write to various parameters can be performed or not. Use this function to preventparameter values from being rewritten by misoperation.ParameterNumberNameInitial Value77 Parameter write selection 0Pr. 77 can be always set independently of the operation mode and operating status.SettingRangeDescription0 Write is enabled only during a stop.1 Parameter write is not enabled.(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 55) can always be written, regardless of the operation mode andoperating status. However, Pr. 72 PWM frequency selection and Pr. 240 Soft-PWM operation selection can be writtenduring operation in the PU operation mode, but cannot be written in external operation mode.(2) Disable parameter write (setting "1")⋅ Parameter write is not enabled. (Reading isenabled.)⋅ Parameter clear and all parameter clear cannotbe performed, either.⋅ The parameters given on the right can be writteneven if Pr. 77 = "1".(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 theirparameter settings.2Parameter write is enabled in any operationmode regardless of operating status.ParameterNumberName22 Stall prevention operation level75 Reset selection/disconnected PU detection/PU stop selection77 Parameter write selection79 Operation mode selection160 User group read selectionParameterNumberName19 Base frequency voltage23Stall prevention operation level compensationfactor at double speed48 Second stall prevention operation current49 Second stall prevention operation frequency60 Energy saving control selection61 Reference current66Stall prevention operation reduction startingfrequency71 Applied motor79 Operation mode selection80 Motor capacity81 Number of motor poles82 Motor excitation current83 Rated motor voltage84 Rated motor frequency90 to 94 (Motor constants)95 Online auto tuning selection96 Auto tuning setting/status100 to 109 (Adjustable 5 points V/F parameter)135 to 139 (Parameter for electronic bypass sequence)178 to 196 (I/O terminal function selection)255 Life alarm status display256 Inrush current limit circuit life display257 Control circuit capacitor life display258 Main circuit capacitor life display291 Pulse train I/O selection292 Automatic acceleration/decelerationParameterNumberName293 Acceleration/deceleration separate selection329Digital input increments selection(Parameter for the plug-in option FR-A7AX)343 Communication error count450 Second applied motor451 Second motor control method selection453 Second motor capacity454 Number of second motor poles455 Second motor excitation current456 Rated second motor voltage457 Rated second motor frequency458 to 462 (Second motor constant)463 Second motor auto tuning setting/status541Frequency command sign selection (CC-Link)(Parameter for the plug-in option FR-A7NC)563 Energization time carrying-over times564 Operating time carrying-over times574 Second motor online auto tuning800 Control method selection819 Easy gain tuning selection858 Terminal 4 function assignment859 Torque current860 Second motor torque current868 Terminal 1 function assignment♦ Parameters referred to ♦Pr. 79 Operation mode selection Refer to page 283280