Using The Power Supply Exceeding 480 Vac; Parameter Write Selection - Mitsubishi Electric FR-A800 Series Instruction Manual

NOTE
• When Pr.570 = "0" (SLD rating), carrier frequency automatic reduction is enabled regardless of the setting in Pr.260.
• To use the FR-A820-03160(55K) and the FR-A840-01800(55K) in the LD and SLD ratings, a DC reactor, which is available
as an option, corresponding to the applied motor is required.
• Setting the LD or SLD rating to the FR-A820-03160(55K) and the FR-A840-01800(55K) changes their parameter setting
increments and setting ranges in the same way as for the FR-A820-03800(75K) and the FR-A840-02160(75K) or higher. In an
example of Pr.9, the setting increment changes from "0.01 A" to "0.1 A" and the setting range changes from "0 to 500 A" to "0
to 3600 A". For the setting of each parameter, refer to the parameter list (on
Parameters referred to
Pr.260 PWM frequency automatic

5.7.12 Using the power supply exceeding 480 VAC

To input a voltage between 480 VAC and 500 VAC to the 400 V class inverter, change the voltage protection level.
Pr.
977 Input voltage mode
E302 selection
• To use a voltage between 480 VAC and 500 VAC, set Pr.977 Input voltage mode selection = "1". The setting is applied
after a reset.
• Setting Pr.977 = "1" changes the voltage protection level to the one for the 500 V class.
• The increased magnetic excitation deceleration operation level is 740 V. Use Pr.660 Increased magnetic excitation
deceleration operation selection to select the increased magnetic excitation deceleration.)
NOTE
• To check availability of stand-alone options when the input voltage is between 480 and 500 VAC, refer to the Instruction
Manual or catalog of each option for details on the ratings.
• Changing the Pr.977 setting does not affect the voltage level to activate the regenerative overvoltage trip (E.OV1 to E.OV3).
• Changing the Pr.977 setting does not affect the voltage level set in Pr.883 Regeneration avoidance operation level.
• The setting of Pr.977 is invalid for the 200 V class inverter.
Parameters referred to
Pr.660 Increased magnetic excitation deceleration operation

5.7.13 Parameter write selection

Whether to enable the writing to various parameters or not can be selected. Use this function to prevent parameter values from
being rewritten by misoperation.
Pr.
77
Parameter write selection
E400
• Pr.77 can be set at any time regardless of the operation mode or operation status. (Setting through communication is
unavailable.)
 Parameter write enabled only during stop (Pr.77 = "0 (initial value)")
• Parameters can be written only during a stop in the PU operation mode.
• The following parameters can always be written regardless of the operation mode or operation status.
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Name Initial value
0
Name Initial value
0
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Setting
range
0 400 V class voltage protection level
1 500 V class voltage protection level
2 For manufacturer setting. Do not set.
selectionpage 735
Setting range
0 Parameter write is enabled only during stop.
1 Parameter writing is disabled.
Parameter writing is enabled in any operation mode
2
regardless of the operation status.
page 166).
Description
Description
5. PARAMETERS
5.7 (E) Environment setting parameters
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