Selection Of Regenerative Brake And Dc Feeding (Pr. 30, Pr. 70) - Mitsubishi Electric FR-A700 Instruction Manual

Motor brake and stop operation

4.14.2 Selection of regenerative brake and DC feeding (Pr. 30, Pr. 70)

When making frequent starts/stops, use the optional high-duty brake resistor (FR-ABR), brake unit (FR-BU2,
BU, FR-BU, MT-BU) to increase the regenerative brake duty.
Use a power regeneration common converter (FR-CV) or power regeneration converter (MT-RC) for continuous
operation in regenerative status.
Use a high power factor converter (FR-HC, MT-HC) to reduce harmonics, improve the power factor, or
continuously use the regenerative mode.
You can select either DC feeding mode 1 in which operation is performed with DC power (terminal P/+, N/-) or
DC feeding mode 2 in which operation is performed normally with the AC power (terminal R/L1, S/L2, T/L3) and
performed with DC power such as battery at occurrence of power failure.
Parameter
Name
Number
Regenerative function
30
selection
Special regenerative
70
brake duty
<FR-A720-02150(FR-A740-01100) or less>
Regeneration Unit
Built-in brake (FR-A720-00330
(FR-A740-00170) or less),
,
brake unit (FR-BU2 FR-BU, BU)
High-duty brake resistor (FR-ABR)
(FR-A720-00900
(FR-A740-00440) or less)
High power factor converter (FR-HC),
power regeneration common
converter (FR-CV)
204
Setting Range
Initial
200V class
Value
(400V class)
0
10
20
1
0
11
21
2
02150
(01100) 0 to 30%
or less
0%
02880
(01440) 0 to 10%
or more
Power Supply to Pr. 30
the Inverter Setting
R/L1, S/L2, T/L3
(initial value)
P/+, N/-
R/L1, S/L2, T/L3 -
P/+, N/-
R/L1, S/L2, T/L3
P/+, N/-
R/L1, S/L2, T/L3 -
P/+, N/-
P/+, N/-
Regeneration unit
Built-in brake resistor, without
regenerative function, brake
unit (FR-BU2 [other than MT-
,
BU5 mode] FR-BU, BU type)
High-duty brake resistor, brake
unit (FR-BU2 [MT-BU5 mode],
MT-BU5), power regeneration
converter (MT-RC)
High power factor converter
(FR-HC, MT-HC), power
regeneration common
converter (FR-CV)
Set the %ED of the built-in brake transistor operation.
Pr. 70
Setting
0 The regenerative brake duty is as follows.
⋅ FR-A720-00030 to 00175 . . . 3%
⋅ FR-A720-00240, 00330 . . . . 2%
10
⎯
⋅ FR-A740-00015 to 00170 . . . 2%
⋅ Other than the above . . . . . . 0%
20
(without built-in brake resistor)
1 Change the setting according to the
capacity.
11
(FR-A720-00330(FR-A740-00170) or less
10/6%
/
21
FR-A720-00460(FR-A740-00230) or
more)
0
2
(initial value)
Description
Terminal for power
supply to the inverter
R/L1, S/L2, T/L3
P/+, N/-
(DC feeding mode 1)
R/L1, S/L2, T/L3 - P/+, N/-
(DC feeding mode 2)
R/L1, S/L2, T/L3
P/+, N/-
(DC feeding mode 1)
R/L1, S/L2, T/L3 - P/+, N/-
(DC feeding mode 2)
P/+, N/-
Remarks