Filter
Top Products
136
Motor brake and stop operation
5.10.2 Selection of a regenerative brake (Pr. 30, Pr. 70)
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.
(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%
CAUTION
As stop holding torque is not produced, install a mechanical brake.
Parameters referred to
Pr. 13 Starting frequency Refer to page 119
Pr. 71 Applied motor
Refer to page 125
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
Number
Name
Initial
Value
Setting
Range
Description
30
Regenerative function
selection
0
0
Inverter without regenerative function
Brake resistor (MRS type, MYS type)
Brake unit (FR-BU2)
1
Brake resistor (MYS type) used at 100% torque / 6%ED
High-duty brake resistor (FR-ABR)
2 For manufacturer setting. Do not set.
70
Special regenerative
brake duty
0% 0 to 30%
Brake duty (6%) when using the brake resistor (MYS type),
Brake duty when using the high-duty brake resistor
(FR-ABR)(10%)
Model Regenerative Brake Duty
FR-E720-0.4KNF to 3.7KNF 3%
FR-E720-5.5KNF or higher
FR-E740-0.4KNF or higher
2%