Mitsubishi Electric FR-A760 Series Instruction Manual page 209

Motor brake and stop operation
(5) Power supply specification at DC feeding
Rated input DC voltage
575V class
Permissible fluctuation
CAUTION
⋅ As voltage between P/+, N/- becomes 1057V or more temporarily at regeneration, make selection of DC power supply carefully.
(6) Regenerative brake duty alarm output and alarm signal (RBP signal)
100%: regenerative overvoltage protection operation value
Ratio of brake duty
to the Pr. 70 setting
Regenerative
brake prealarm
(RBP)
OFF
REMARKS
⋅ The MRS signal can also be used instead of the X10 signal. (Refer to page 220.)
⋅ Refer to pages 39 for the connection of external brake resistor other than provided brake resistor and brake unit (FR-BU-C).
⋅ When AC power is connected to terminal R/L1, S/L2, T/L3 during DC feeding with "10 or 11" (DC feeding) set in Pr. 30, an option
fault (E.OPT) occurs.
⋅ When DC feeding operation is performed with "10 or 11" (DC deeding) set in Pr. 30, undervoltage protection (E.UVT) and
instantaneous power failure (E.IPF) are not detected.
CAUTION
⋅ The brake resister is not connectable to the 00550 or more inverter, the Pr. 70 setting is invalid.
⋅ Changing the terminal assignment using Pr. 178 to Pr. 189 (input terminal function selection) or Pr. 190 to Pr. 196 (output terminal
function selection) may affect the other functions. Please make setting after confirming the function of each terminal. (Refer to page
217)
The value set in Pr. 70 must not exceed the setting of the brake resistor used.
Otherwise, the resistor can overheat.
♦ Parameters referred to ♦
Pr. 57 Restart coasting time
Pr. 178 to Pr.189 (input terminal function selection)
Pr. 190 to Pr.196 (output terminal function selection)
Pr. 261 Power failure stop selection
198
100%
85%
ON
ON
Time
WARNING
Refer to page 250
Refer to page 217
Refer to page 225
Refer to page 254
742VDC to 848VDC
667VDC to 933VDC
⋅ [RB] appears on the operation panel and an alarm signal (RBP) is
output when 85% of the regenerative brake duty set in Pr. 70 is
reached. If the regenerative brake duty reaches 100% of the Pr.
70 setting, a regenerative overvoltage (E.OV1 to E.OV3) occurs.
⋅ The inverter does not trip when the alarm signal is output.
⋅ For the terminal used for the RBP signal output, assign the
function by setting "7" (positive logic) or "107" (negative logic) in
any of Pr. 190 to Pr. 196 (output terminal function selection).