Mitsubishi Motors Oven FR-A5AP User Manual

57

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 supply

Frequency setting potentiometer

e.g. pulse
generator

Inverter

Motor

Pr

ese

t fr

eque

n

c

y

Input pulse frequency

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.