Hitachi L100 Instruction Manual page 72

3–16
Frequency-related Functions
Func.
Code
A61 Frequency upper limit
setting
A62 Frequency lower limit
setting
A63, Jump (center)
A65, frequency setting
A67
A64, Jump (hysteresis)
A66, frequency width
A68 setting
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"A" Group: Standard Functions
The inverter output generates a variable-frequency waveform that determines the motor
speed (minus slip losses). You can configure the lower frequency limit to be greater than
zero as shown in the graph (below left). The upper limit must not exceed the rating of the
motor or capability of the machinery. Some motors or machines exhibit resonances at a
particular speed, which can be destructive. The inverter has up to three jump frequencies
(see graph, below right) with hysteresis around them to cause the inverter output to skip
around the sensitive frequency values.
Output frequency
A61 Upper
limit
Lower
A62
limit
Frequency command
"A" Function
Name
Sets a limit on output
frequency less than the
maximum frequency (A04)
Range is 0.5 to 360.0 Hz
0.0 ..setting is disabled
>0.1 setting is enabled
Sets a limit on output
frequency greater than zero
Range is 0.5 to 360.0 Hz
0.0 ..setting is disabled
>0.1 setting is enabled
Up to 3 output frequencies can
be defined for the output to
jump past to avoid motor
resonances (center frequency)
Range is 0.0 to 360.0 Hz
Defines the distance from the
center frequency at which the
jump around occurs
Range is 0.0 to 10.0 Hz
Output frequency
A63
Settable
range
Run-
time
Description
Edit
Jump
frequency
A64
Frequency command
Defaults DOP,DRW,DOP+
EU/ Func.
Units Name
US Code
0.0 Hz F-26 LIMIT H
0.0 Hz F-26 LIMIT L
0.0 Hz F-27 JUMP F1
0.0 JUMP F2
0.0 JUMP F3
0.5 Hz F-27 JUMP W1
0.5 JUMP W2
0.5 JUMP W3