Advanced Operation
7.3.5 External Terminal Functions: H
- 40
DC Injection Braking Command (Setting: 60)
OFF
Normal operation
ON
Applies DC injection braking if the Inverter is stopped. (Applies initial excitation when flux
vector control is being used.)
D
DC injection braking is used to prevent the motor from rotating due to inertia or external forces when
the Inverter is stopped.
D
DC injection braking is performed if the DC injection braking input is ON while the Inverter is stopped.
D
If a run command or jog command (jog, forward jog, or reverse jog) is input, the DC injection braking
will be cleared and motor operation will be started.
DC
braking
DC
braking
Run command
DC injection
braking com-
mand
Output
frequency
E1-09 Min. output frequency
b2-01 Zero speed
level
ON
ON
OFF
OFF
Fig
7.24
Timing Chart for DC Injection Braking Command
External Speed Search 1 (Settings: 61)
OFF
Normal operation
ON
Starts a speed search from the maximum output frequency.
External Speed Search 2 (Settings: 62)
OFF
Normal operation
ON
Starts a speed search from the set frequency (from the current reference frequency when the
external search command turn ON).
D
Either one of the external search functions can be set, but not both.
D
The speed search function can be used to operate the motor without tripping when switching operation
from a commercial power supply and the Inverter or starting a coasting motor.
D
The speed search will begin after the minimum baseblock time (L2-03) has elapsed when the run com-
mand is input after the external search command has been turned ON.
External search
command
5 ms min.
Maximum output
frequency or set
frequency
Output frequency
Deceleration time set in b3-03.
Minimum baseblock time
Run command
ON
OFF
ON
OFF
Frequency
reference
that was
set.
Fig
7.25
Timing Chart for the External Search Command
7