Mitsubishi Electric FR-F720-0.75K to 110K Instruction Manual page 117

Motor brake and stop operation
(1) When the brake unit (FR-BU2, BU, FR-BU) is used
⋅ Set "0 (initial value), 10 or 20" in Pr. 30. The Pr. 70 setting is invalid.
CAUTION
⋅ Set "1" in Pr. 0 Brake mode selection of the FR-BU2 to use GRZG type discharging resistor.
⋅ Do not operate the MT-BU5 type brake unit and FR-BU2 in parallel. Doing so could cause an alarm or brake unit failure. Use the
FR-BU2 only when performing parallel operation.
(2) When using a brake unit (MT-BU5) and power regeneration converter (MT-RC) (75K or
more)
⋅ Set "1, 11 or 21" in Pr. 30.
⋅ Set "10%" In Pr. 70 when using a brake unit (MT-BU5).
⋅ Set "0%" in Pr. 70 when using a power regeneration converter (MT-RC).
CAUTION
⋅ Set "2" in Pr. 0 Brake mode selection of the FR-BU2 to use MT-BR5 type resistor unit.
(3) When using the high power factor converter (FR-HC, MT-HC) or power regeneration
common converter (FR-CV)
⋅ Set "2" in Pr. 30. The Pr. 70 setting is made invalid.
⋅ Use any of Pr. 178 to Pr. 189 (Input terminal function assignment) to assign the following signals to the contact input
terminals.
(a) X10 signal: FR-HC, MT-HC connection, FR-CV connection (inverter operation enable signal)
To make protective coordination with the FR-HC, MT-HC or FR-CV, use the inverter operation enable signal
to shut off the inverter output. Input the RDY signal of the FR-HC, MT-HC (RDYB signal of the FR-CV).
(b) X11 signal: FR-HC, MT-HC connection (instantaneous power failure detection signal)
When the setting has been made to hold the mode at occurrence of an instantaneous power failure for RS-
485 communication operation, use this signal to hold the mode. Input the Y1 or Y2 signal (instantaneous
power failure detection signal) of the FR-HC, MT-HC.
⋅ For the terminal used for X10 or X11 signal input, assign its function by setting "10" (X10) or "11" (X11) in any of Pr.
178 to Pr. 189.
REMARKS
⋅ When Pr. 30 = "2", "Err" is displayed on the operation panel as the inverter is reset by the setting.
(4) DC feeding mode 1 (Pr. 30 = "10, 11")
⋅ Setting "10, 11" in Pr. 30 enables DC power supply operation.
⋅ Leave the AC power supply connection terminal R/L1, S/L2, and T/L3 open and connect the DC power supply to
terminal P/+ and N/-. Also, remove jumpers across terminal R/L1 and R1/L11 as well as S/L2 and S1/L21, and
connect terminals R1/L11 and S1/L21 to terminal P/+ and N/-.
⋅ The diagram below is a connection example.
Frequency command
Frequency setting
108
DC power
MC
(+)
(-)
Forward rotation start
Reverse rotation start
Contact input common
3
2
potentiometer
1/2W1kΩ
1
Inverter
Inrush
U
R/L1 current
limit circuit
S/L2 V
T/L3 W
R1/L11
S1/L21
P/+
N/-
STF
STR
SD
10
2
5
IM
Earth
(Ground)