4-41
BRD (dynamic braking) function
This function only operates with the L300P - 15kW and lower, as they have the
built-in BRD.
This function is to consume regenerative energy from the motor as heat by the
use of an external resistor.
Regeneration occurs when the motor is decelerated to quickly and the motor turns into a generator and
voltage flows back into the Inverter.
To use the BRD function, set following condition.
Set item
Function
code
Data
Description
0.0
BRD don’t operate.
BRD usage
Ratio
b090
0.1-100.0
The usage ratio of BRD is set by 0.1% unit.
When inverter exceeds the usage ratio, trip.
(t1+t2+t3)
100 second
00
BRD don’t operate.
01
During run: valid (BRD operates.)
During stop: invalid (BRD doesn’t operate.)
Selection of
BRD
b095
02
During run, stop, valid (BRD operates.)
(Note 1)
330-380
Units: V In case of 200V class inverter, setting is valid.
BRD ON
Level
b096
(Note 1)
660-760
Units: V In case of 400V class inverter, setting is valid.
(Note 1) BRD ON level is the voltage setting of the DC (direct current) voltage of the inverter.
Cooling fan operating selection
You can select whether the fan operates continuously or operates only when the
inverter is in the running operation.
Function
code
Data
Description
00
Always run
b092
01
Only during run
However, inverter operates for five minutes after
power ON, and for five minutes after inverter
operation stops.
Chapter 4 Explanation of function
BRD action
t2
ON
ON
ON
100 second
t1
t3
b092:Cooling fan
operation selection
Relation code
X100
Usage ratio (%) =
b090: BRD usage ratio
b095: BRD selection
b096: BRD On level
Relation code