Selection Of A Regenerative Brake (Pr. 30, Pr. 70) - Mitsubishi Electric 700 Series Instruction Manual

Motor brake and stop operation
As stop holding torque is not produced, install a mechanical brake.
Parameters referred to
Pr. 13 Starting frequency
Pr. 71 Applied motor

5.10.2 Selection of a regenerative brake (Pr. 30, Pr. 70)

When making frequent starts/stops, use the optional brake resistor (MRS type, MYS type), high-duty brake resistor
(FR-ABR) and brake unit (FR-BU2) to increase the regenerative brake duty.
Parameter
Name
Number
Regenerative function
30
selection
Special regenerative
70
brake duty
The above parameters can be set when Pr. 160 User group read selection = "0". (Refer to page 167)
(1) When using the brake resistor (MRS type, MYS type) and the brake unit (FR-BU2)
Set Pr. 30 = "0 (initial value)". The Pr. 70 setting is made invalid.
At this time, the regenerative brake duty is as follows.
Model
FR-E720-0.4KNF to 3.7KNF
FR-E720-5.5KNF or higher
FR-E740-0.4KNF or higher
(2) When using the brake resistor (MYS type) at 100% torque / 6%ED (FR-E720-3.7KNF only)
Set "1" in Pr. 30.
Set "6%" in Pr. 70.
(3) When using the high-duty brake resistor (FR-ABR) (0.4K or higher)
Set "1" in Pr. 30.
Set Pr. 70 as follows.
7.5K or lower...................................................................................................................................... 10%
11K, 15K ............................................................................................................................................ 6%
136
CAUTION
Refer to page 119
Refer to page 125
Initial
Value
0
0%
Regenerative Brake Duty
3%
2%
Setting
Range
Inverter without regenerative function
0 Brake resistor (MRS type, MYS type)
Brake unit (FR-BU2)
Brake resistor (MYS type) used at 100% torque / 6%ED
1
High-duty brake resistor (FR-ABR)
2 For manufacturer setting. Do not set.
Brake duty (6%) when using the brake resistor (MYS type),
0 to 30% Brake duty when using the high-duty brake resistor
(FR-ABR)(10%)
Description