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5.5. Setting Example
When the frequency is set to 0 to 60Hz at the input pulse frequency setting of 0 to 50kpps.
NFB
IM
FR-A5AP
Hz
0
60
50kpps
0 to 50kpps
0 to 60Hz
Power suppl
y
Fre
q
uenc
y
settin
g
potentiometer
e.
g
. pulse
g
enerator
Inverter
Motor
Preset frequency
Input pulse fre
q
uenc
y
R
(
L1
)
S
(
L2
)
T
(
L3
)
U
V
W
1) From the maximum number of input pulses, calculate the Pr. 384 "input pulse frequency division ratio" value.
Pr. 384 =
Maximum number of input pulses(pps)
400
=
50000
= 125
Set 125 in Pr. 384.
400
2) Set the zero-input pulse frequency and maximum-input pulse frequency.
Pr. 385 = 0Hz
Pr. 386 = 60Hz
<Example> The following is the calculation of the minimum frequency that may be detected using the above setting
example:
Minimum frequency =
Pr. 386
2
16.6ms
Pr. 384
400
=
60
2
16.6
10
3
125
400
= 0.04(Hz)
Therefore, the frequency that may be detected is the starting frequency of 0.5Hz or higher.