Hitachi J300U Series - Manual (Page 57)

7-17
Contents and display
Extension
function
code
➤
➤
1
➤
FUNC
.
Frequency
upper,
lower
limiter
,,
,,
➤
➤ Settable range
2
➤
FUNC
Initial value
(400) Maximum
frequency limiter
➤
➤
1
➤
FUNC
.
2
➤
FUNC
Initial value
(400) Minimum
frequency limiter
Setting example
(When an upper limit of 45 Hz and a lower
limit of 20 Hz are set)
Output frequency
(60 Hz)
Upper limiter
Lower limiter
45
20
0
Frequency command
(F-SET)
NOTE: Setting conditions
0 Hz or upper limit
≥
lower limit
When 0 Hz is set, the limiters will not operate.
Set the limits of frequency setting within the start frequency adjustment range and
maximum frequency setting range. When a value beyond the limits is inputted from the operator,
it will not be stored. Even if a value beyond the limits is inputted as external analog input, the set
value will not be changed.
➤
➤
➤
➤
➤
➤
➤
➤
➤ ➤
➤ ➤
➤
➤
➤
➤
➤
➤
➤
➤
➤
➤
1
➤
FUNC
.
2
➤
FUNC
Initial value
In the case
of jump frequency 1
Jump
frequency
setting 1
To avoid a resonance with the load, the frequencies at up to 3 points can be jumped. The setting
order and the execution order may be changed.
The frequency equivalent to the jump frequency setting width (± 0.5 Hz) (Note 1) cannot be set as
a jump frequency.
f f
0 0
Set frequency (V) Output frequency (V)
f
45
30
10
0
Speed command
frequency
In the case
of jump frequency 2
In the case
of jump frequency 3
Jump
frequency
setting 2
Jump
frequency
setting 3
NOTE 2 : As to the frequencies which are set by the jump frequency setting function, the set
frequencies are jumped but the output frequencies pass.
Setting example
Jump frequency 1: 10 Hz
Jump frequency 2: 30 Hz
Jump frequency 3: 45 Hz
Jump frequency width: 0.5 Hz
Output
frequency
Adjustment range
(V)
Deceleration
Acceleration
Frequency which
jumps by 1.0 Hz
0.5 Hz
0.5 Hz
NOTE 1 : The jump frequency can be set by the remote operator.