Mitsubishi Electric FR-A720-0.4K Instruction Manual page 212

Motor brake and stop operation
(7) Power supply specification at DC feeding
Rated input DC voltage
200V class
Permissible fluctuation
Rated input DC voltage
400V class
Permissible fluctuation
CAUTION
⋅ As voltage between PN becomes 415V (830V) or more temporarily at regeneration, make selection of DC power supply carefully.
(8) 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 224.)
⋅ Refer to pages 47 to 51 for the connection of high-duty brake resistor (FR-ABR), brake unit, high power factor converter (FR-HC,
MT-HC) and power regeneration common converter (FR-CV).
⋅ When AC power is connected to terminal R/L1, S/L2, T/L3 during DC feeding with "2, 10, 11, 20, or 21" (DC feeding) set in
Pr.30, an option alarm (E.OPT) occurs.
⋅ When DC feeding operation is performed with "2, 10, 11, 20, or 21" (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 30K 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
221)
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
202
100%
85%
ON
ON
Time
CAUTION
Refer to page 253
Refer to page 221
Refer to page 228
Refer to page 257
283VDC to 339VDC
240VDC to 373VDC
537VDC to 679VDC
457VDC to 740VDC
⋅ [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 shut off the output 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).