Mitsubishi Electric FR-F740-00023 Instruction Manual page 115

Motor brake and stop operation
(6) Power supply specification at DC feeding
Rated input DC voltage
400V class
Permissible fluctuation
CAUTION
As voltage between P/+, N/- becomes 830V or more temporarily at regeneration, make selection of DC power supply carefully.
(7) Regenerative brake duty alarm output and alarm signal (RBP signal) (01800 or more)
100%: regenerative overvoltage protection operation value
Ratio of brake duty
to the Pr. 70 setting
Regenerative
brake prealarm
(RBP)
REMARKS
The MRS signal can also be used instead of the X10 signal. (Refer to page 110.)
Refer to pages 31 to 38 for connection of the 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 or 11" (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 feeding) set in Pr. 30, undervoltage protection (E.UVT)
and instantaneous power failure (E.IPF) are not detected.
CAUTION
Changing the terminal assignment using Pr. 178 to Pr. 189 (input terminal function selection) may affect the other functions. Please
make setting after confirming the function of each terminal.
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
106
100%
85%
OFF
ON ON
Refer to page 136
Refer to page 110
Refer to page 116
Refer to page 140
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
Tim
any of Pr. 190 to Pr. 196 (output terminal function selection).
WARNING