A 62, A 63 Base And Maximum Frequency Setting; A 64 Maximum Frequency Selection; A 80, A 81 Frequency Command Output Frequency Adjust (O-L, Oi-L) - Hitachi J300 Series Instruction Manual

Extension
function
code
Base
frequency
setting
Maximum
frequency
setting








100%




Select 120 Hz or 400 Hz as the upper limit that can be set in the maximum frequency setting (A63).
Maximum
frequency
selection
Adjust the relationship between the external frequency command and the inverter output frequency.
This function is factory-set to the appropriate position. If this setting is changed unnecessarily, the
correct relationship between the external frequency command and output frequency is no longer
maintained. This will result in poor control performance. Adjust the setting of this function only
Frequency
when the output frequency does not conform to the external command.
command
Adjustment method
output
frequency
adjust
(O-L, OI-L)
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Set the base frequency and
Setting method
2
FUNC
Initial value
2
(400)
When the frequency is set so that the base
frequency is larger than the maximum
frequency, the base frequency is forced
to be made equal to the maximum
frequency at the start of running.

Freely setting range
V
(NOTE 3)

0
30 Hz 60 Hz
Initial value
FUNC
2
: Voltage command (O-L)
: Current command (OI-L)
Voltage command: Put voltage command (10V of 5V) to O-L terminal, and adjust
output frequency comes to maximum.
Current command: Put current command (4-20mH) to OI-L terminal, and adjust
output frequency comes to maximum.
Contents and display
maximum frequency.
1
FUNC
1
NOTE 1:
NOTE 2:
120 Hz 400 Hz
f
1
7-25
Setting example
V V
100% 100%
0 0
60 Hz
f
(A62) base frequency (A62) base frequency: 60 Hz
and (A63) maximum
(A63) maximum frequency:
frequency: 60 Hz
120 Hz
When a frequency more than the base frequency 60 Hz
is used, the motor is not a general purpose motor but
a special motor. Therefore, the maximum applicable
motor set value is different.
When the kW display is the same, the inverter
capacity may be increased.
Set the base frequency according to the specifications
of the motor. When the base frequency is set to less
than 50 Hz, the motor may be burned.
60 Hz 120 Hz
f
unit
unit