Selection Of A Regenerative Brake (Pr. 30, Pr. 70) - Mitsubishi Electric FR-E700 Instruction Manual

Parameter
6.9.2

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

● When making frequent starts/stops, use the optional high-duty brake resistor (FR-ABR,
MRS) and brake unit (FR-BU2) to increase the regenerative brake duty.
● Use a power regeneration common converter (FR-CV) for continuous operation in regen-
eration status.
Use the high power factor converter (FR-HC) to reduce harmonics, improve the power factor,
or continuously use the regenerative status.
Pr.
Name
No.
Regenerative function
30
selection
Special regenerative
70
brake duty
The above parameters can be set when Pr. 160 "User group read selection" = 0.
When using the brake resistor (MRS), the brake unit (FR-BU2), power regeneration
common converter (FR-CV), and high power factor converter (FR-HC).
Set Pr. 30 to "0" (initial value). The Pr. 70 setting is made invalid. At this time, the regenerative
brake duty is as follows.
● FR-E720S-030 or more .............3%
● FR-E740-016 or more................2%
● Assign the inverter operation enable signal (X10) to the contact input terminal.
To make protective coordination with the FR-HC and FR-CV, use the inverter operation
enable signal to shut off the inverter output.
Input the RDY signal of the FR-HC (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. 184.
When using the high-duty brake resistor (FR-ABR)
(FR-E720S-030 or more, FR-E740-016 or more)
Set "1" in Pr. 30. Set Pr. 70 as follows.
● FR-E720S-100 or less, FR-E740-170 or less............. 10%
● FR-E740-230 and 300 .................................................. 6%
FR-E700 EC
Initial Setting
Description
Value Range
Brake resistor MRS,
Brake unit (FR-BU2)
0 Power regeneration common converter
(FR-CV)
High power factor converter (FR-HC)
0
1 High-duty brake resistor (FR-ABR)
High power factor converter (FR-HC) when
2 automatic restart after instantaneous
power failure is selected
Brake duty when using the high-duty
0% 0–30%
brake resistor (FR-ABR)
Motor brake and stop operation
Parameters referred to
57 Restart coasting
time
178–184 Input terminal
function selection
190–192 Output terminal
function selection
Refer to
Section
6.12.1
6.10.1
6.10.5
6 - 101