A 5, A 6 Frequency Upper, Lower Limiter; A 7, A 8, A 9 Jump Frequency Setting 1-3 - Hitachi J300 Series Instruction Manual

Extension
function
code
Set the limits of frequency setting within the
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.
Maximum
frequency limiter
Frequency
upper,
lower
limiter
Minimum
frequency limiter
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.
Jump
frequency
setting 1
Jump
frequency
setting 2
In the case
Jump
of jump frequency 1
frequency
setting 3
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2
FUNC
FUNC
2
FUNC
FUNC
NOTE 1 : The jump frequency can be set by the remote operator.
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.
f
0
Set frequency (V)
2
FUNC
Initial value
FUNC
Contents and display
(400)
1
Output frequency
.
Initial value
(60 Hz)
Upper limiter
Lower limiter
(400)
1
.
Initial value
NOTE: Setting conditions
0 Hz or upper limit ≥ lower limit
When 0 Hz is set, the limiters will not operate.
f
Output
frequency
0
Output frequency (V)
In the case
of jump frequency 2
1
In the case
of jump frequency 3
.
Deceleration
7-17
start frequency adjustment range and





Setting example
(When an upper limit of 45 Hz and a lower
limit of 20 Hz are set)

45
20
0
Setting example
Jump frequency 1: 10 Hz
Jump frequency 2: 30 Hz
Jump frequency 3: 45 Hz
Jump frequency width: 0.5 Hz
f
45
Adjustment range
30
10
0
0.5 Hz
0.5 Hz
Acceleration
Frequency command
(F-SET)
(V)
Speed command
frequency
Frequency which
jumps by 1.0 Hz