Selection Of A Regenerative Brake (Pr. 30, Pr. 70) - Mitsubishi Electric FR-F700PJ Instruction Manual

4.10.3 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.
 Use a power regeneration common converter (FR-CV) for continuous operation in regeneration status.
Use the high power factor converter (FR-HC2) to reduce harmonics, improve the power factor, or continuously use
the regenerative status.
Parameter
Name
Number
Regenerative function
30
selection
Special regenerative
70
brake duty
The above parameters can be set when Pr. 160 Extended function display selection = "0". (Refer to page 197)
(1) When using the brake resistor (MRS type, MYS type), brake unit (FR-BU2), power regeneration
common converter (FR-CV), and high power factor converter (FR-HC2)
Set Pr. 30 to "0" (initial value). The Pr. 70 setting is invalid.
At this time, the regenerative brake duty is as follows.
Type
FR-F720PJ-0.4K to 3.7K
FR-F720PJ-5.5K or higher
FR-F740PJ-0.4K or higher
Assign the inverter operation enable signal (X10) to the contact input terminal. To make protective coordination with the
FR-HC2 and FR-CV, use the inverter operation enable signal to shut off the inverter output.
Input the RDY signal of the FR-HC2 (RDYB signal of the FR-CV).
For the terminal used for X10 signal input, assign its function by setting "10" (X10) to any of Pr. 178 to Pr. 182.
(2) Brake resistor (MYS type) used at 100% torque/6%ED (FR-F720PJ-3.7K only)
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 Pr. 70 as follows.
7.5K or lower ............ 10%
11K, 15K................... 6%
Motor brake and stop operation
Initial Setting
Value Range
Inverter without regenerative function,
Brake resistor (MRS type, MYS type),
0 Brake unit (FR-BU2),
Power regeneration common converter (FR-CV),
0
High power factor converter (FR-HC2)
Brake resistor (MYS type) used at 100% torque/6%ED,
1
High-duty brake resistor (FR-ABR)
High power factor converter (FR-HC2) when automatic
2
restart after instantaneous power failure is selected
Brake duty when using the high-duty brake resistor
0% 0 to 30%
(FR-ABR)
Regenerative brake duty
3%
2%
Description
131
4