Regenerative Brake Duty (Pr. 30, Pr. 70) - Mitsubishi Electric FR-E520 Instruction Manual

4.2.13 Regenerative brake duty (Pr. 30, Pr. 70)

Pr. 30 "regenerative function selection"
Pr. 70 "special regenerative brake duty"
• When making frequent starts/stops, use the optional "brake resistor" to increase the
regenerative brake duty. (0.4K or more)
Parameter
Number
30
70
<Setting>
(1) When using the brake resistor (MRS), BU type brake unit, high power
factor converter (FR-HC), power regeneration common converter (FR-CV)
• Set "0" in Pr. 30.
• The Pr. 70 setting is made invalid.
(2) When using the brake resistors (2 MYSs in parallel) (3.7K is only
allowed)
• Set "1" in Pr. 30.
• Set "6%" in Pr. 70.
(3) When using the high-duty brake resistor (FR-ABR)
• Set "1" in Pr. 30.
• Set "10%" in Pr. 70.
Note: 1. Pr. 70 "regenerative brake duty" indicates the %ED of the built-in brake
transistor operation. The setting should not be higher than the permissible
value of the brake resistor used. Otherwise, the resistor can overheat.
2. When Pr. 30 = "0", Pr. 70 is not displayed but the brake duty is fixed at 3%.
(Fixed at 2% for 5.5K, 7.5K)
3. The brake resistor cannot be connected to 0.1K and 0.2K inverters.
The value set in Pr. 70 should not exceed the value set to the brake
resistor used.
Otherwise, the resistor can overheat.
Factory Setting
Setting Range
0
0% 0 to 30%
WARNING
0,1
100
PARAMETERS