Selection Of A Regenerative Brake And Dc Feeding (Pr. 30, Pr. 70) - Mitsubishi Electric FR-F720-0.75K to 110K Instruction Manual

4.9.2

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

When making frequent starts/stops, use the optional 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 DC feeding mode 1, which operates with DC power supply (terminal P/+, N/-), or DC feeding
mode 2, which normally operates with AC power supply (terminal R/L1, S/L2, T/L3) and with DC power supply
such as battery at power failure occurrence.
Parameter
Name
Number
30
Regenerative function
selection
Special regenerative
70
brake duty
The above parameters can be set when Pr. 160 User group read selection = "0". (Refer to page 175)
....
Specifications differ according to the date assembled. Refer to page 322 to check the SERIAL number.
<55K or less>
Regeneration Unit
Inverter without regenerative function,
,
brake unit (FR-BU2 FR-BU, BU)
High power factor converter (FR-HC),
power regeneration common
converter (FR-CV)
<75K or more>
Regeneration Unit
Brake unit (FR-BU2)
Power regeneration converter (MT-RC) R/L1, S/L2, T/L3
Brake unit (MT-BU5)
High power factor converter (FR-HC)
Initial
Setting Range
Value
0
10
20
1
0
11
21
2
0% 0 to 10%
Power Supply to Pr. 30
the Inverter Setting
0
R/L1, S/L2, T/L3
(initial value)
P/+, N/- 10
R/L1, S/L2, T/L3 -
20
P/+, N/-
P/+, N/- 2
Power Supply to the
Inverter
R/L1, S/L2, T/L3
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/-
Motor brake and stop operation
Description
Regeneration unit
Inverter without regenerative
function, brake unit (FR-BU2,
FR-BU, BU type)
Brake unit (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 brake transistor operation when using a
brake unit (MT-BU5).
(Setting can be made only for the 75K or more)
Pr. 30 Pr. 70
Setting Setting
0
(initial value)
⎯
10
20
0%
1
(initial value)
1
11 10%
21
⎯
2
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/-
107
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