Hitachi L300P - Manual (Page 88)

L300P Inverter
Configur
ing Dr
iv
e
P
a
ra
met
e
rs
3–19
Frequency-
related Functions Frequency Limits – Upper and lower
limits can be imposed on the inverter
output frequency. These limits will apply
regardless of the source of the speed
reference. You can configure the lower
frequency limit to be greater than zero as
shown in the graph to the right. The upper
limit must not exceed the rating of the
motor or capability of the machinery.
Jump Frequencies – Some motors or machines exhibit resonances at particular speed(s),
which can be destructive for prolonged running at those speeds. The inverter has up to three
jump frequencies as shown in the graph. The hysteresis around the jump frequencies causes the
inverter output to skip around the sensitive frequency values.
Output frequency
Upper
limit
Frequency command
Lower
limit
Settable
range
A061
A062
“A” Function Run
Mode
Edit
Lo Hi
Defaults
Units SRW Display
Func.
Code
Name Description
–FE2
(CE)
–FU2
(UL)
–FR
(Jpn)
A061 Frequency upper limit
setting
Sets a limit on output
frequency less than the
maximum frequency (A004)
Range is 0.50 to 400.0 Hz
0.00 setting is disabled
>0.10 setting is enabled
✘ ✔ 0.00 0.00 0.00
Hz >A061 LIMIT
HIGH 0000.00Hz
A261 Frequency upper limit
setting, 2nd motor
Sets a limit on output
frequency less than the
maximum frequency (A004)
Range is 0.50 to 400.0 Hz
0.00 setting is disabled
>0.10 setting is enabled
✘ ✔ 0.00 0.00 0.00
Hz >A261 2LIMIT
HIGH 0000.00Hz
A062 Frequency lower limit
setting
Sets a limit on output
frequency greater than zero
Range is 0.50 to 400.0 Hz
0.00 setting is disabled
>0.1 setting is enabled
✘ ✔ 0.00 0.00 0.00
Hz >A062 LIMIT
LOW 0000.00Hz
A262 Frequency lower limit
setting, 2nd motor
Sets a limit on output
frequency greater than zero
Range is 0.50 to 400.0 Hz
0.00 setting is disabled
>0.10 setting is enabled
✘ ✔ 0.00 0.00 0.00
Hz >A262 2LIMIT
LOW 0000.00Hz
Frequency command
Jump frequencies
Output
frequency
Hysteresis values
A067
A065
A063
A064
A064
A066
A066
A068
A068