Mitsubishi Electric FR-A800, Instruction Manual

Page: 383 / 1042

Parameters (E) Environment setting parameters
FR-A800 5 - 203
5.7.11 Using the power supply exceeding 480V
To input a voltage between 480 V and 500 V to the 400 V class inverter, change the voltage protection
level.
●
To use a voltage between 480 V and 500 V, set Pr. 977 "Input voltage mode selection" = "1". The
setting is applied after a reset.
●
Setting Pr. 977 = "1" will change the voltage protection level to the one for the 500 V class.
●
The increased magnetic excitation deceleration level is changed to 740 V. (Use Pr. 660 "Increased
magnetic excitation deceleration operation selection" to select the increased magnetic excitation
deceleration.)
5.7.12 Parameter write selection
Whether to enable the writing to various parameters or not can be selected. Use this function to pre-
vent parameter values from being rewritten by misoperation.
Pr. 77 can be set at any time regardless of the operation mode or operation status. (Setting through
communication is unavailable.)
Pr. Name Initial value Setting range Description
977
E302
Input voltage mode selection 0
0 400 V class voltage protection level
1 500 V class voltage protection level
NOTES Stand-alone options (except line noise filter) cannot be used when inputting a voltage between
480 and 500 V.
The voltage protection level of the 200 V class inverters is not affected by the Pr. 977 setting.
Parameters referred to
Pr. 660
Increased magnetic excitation deceleration operation
selection
=> page 5-689
Pr. Name Initial value Setting range Description
77
E400
Parameter write selection 0
0 Writing is enabled only during stop.
1 Parameter writing is disabled.
2
Parameter writing is enabled in any
operation mode regardless of the
operation status.