50
2-8-10 Output Frequency Limit
Item name
Constant to be set
Factory preset
Frequency (speed) command upper limit
No. 24
100%
Frequency (speed) command lower limit
No. 25
0
The upper and lower limits for the output frequency can be
clamped. When the lower limit is not 0, acceleration to that lower
limit setpoint begins immediately when the start command is input.
100%
0
100%
No. 25
No. 24
Output frequency
Frequency command
Note
By setting constant No. 24 to 110%, frequencies up to 1.1 times the
value of constant No. 2 can be output. However, 400 Hz is the high-
est frequency that can be output.
For example, assume constant No. 2 = 60 Hz. A frequency of 66 Hz
will be output if constant No. 24 = 1.1.
2-8-11 DC Injection Braking
Item name
Constant to be set
Factory preset
DC injection braking current
No. 26
50%
DC injection during stop
No. 27
0.5 s
DC injection at start
No. 28
0.0 s
A 100% setting for the DC injection braking current equals the
Inverter’s rated current. The default setting set at the factory prior
to shipping is 50%.
Prevents overrun at stop. (Exact position stop)
No. 7
No. 26
No. 27
Time
Frequency
Current
Time
Stops a coasting motor without tripping even when the direction of
rotation is unknown.
No. 7
No. 26
No. 28
Time
Frequency
Current
Time
DC Injection Braking
Current
DC Injection Braking
During Stop
Starting DC Injection
Braking During Start
Description of Functions and Constants
Section 2-8
