114
Motor brake and stop operation
4.10.4 Selection of a regenerative brake (Pr. 30, Pr. 70)
The above parameters can be set when
Pr. 160 Extended function display selection
= "0".
(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 3%.
Assign the Drive unit run enable (X10) signal to the contact input terminal. To make protective coordination with the FR-
HC2 and FR-CV, use the drive unit operation enable signal to shut off the drive unit 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-D720-3.7K-G 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
"10%" in
Pr. 70
.
NOTE
Changing the terminal assignment using
Pr. 190
or
Pr. 192 (output terminal function selection)
may affect the other
functions. Set parameters after confirming the function of each terminal.
The MBR signal is disabled while the main circuit capacitor life is being measured.
The motor generates no torque while the electromagnetic brake is in the open status before drive unit operation and
after DC injection brake operation. Thus, the motor may be rotated by an external force. Check that no drops or other
accidents will occur in an application like a lift, where the motor may rotate in the brake-open status.
Parameters referred to
Pr. 10 Coasting speed
Pr. 11 DC injection brake operation time
Pr. 190, Pr. 192 (output terminal function selection)
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
Number
Name
Initial
Value
Setting
Range
Description
30
Regenerative function
selection
0
0
Drive unit without regenerative function,
Brake resistor (MRS type, MYS type),
Brake unit (FR-BU2)
Power regeneration common converter (FR-CV)
High power factor converter (FR-HC2)
1
Brake resistor (MYS type) used at 100% torque/6%ED,
High-duty brake resistor (FR-ABR)
70
Special regenerative
brake duty
0%
0 to 30%
Brake duty when using the high-duty brake resistor
(FR-ABR)
Summary of Contents for FR-D720-0.2K-G
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