Mitsubishi Electric FR-A720-0.4K Instruction Manual page 272

(2) Frequency monitoring reference (Pr. 55)
• Set the full scale value when outputting the frequency monitor from terminal FM or AM.
• For the calibration of terminal FM, set the full-scale value of the connected meter when the pulse speed of terminal
FM is 1440 pulse/s (50k pulse/s).
Set the frequency to be indicated as the full scale value on the frequency meter (1mA analog meter) connected
between terminal FM and SD. (For example, 60Hz or 120Hz.)
Pulse speed is proportional to the output frequency of the inverter. (Maximum pulse train output is 2400 pulse/s
(55k pulse/s)).
• For the calibration of terminal AM, set the full-scale value of the connected meter when output voltage of terminal
AM is 10VDC.
Set the frequency to be indicated as the full scale value on the meter (10VDC voltmeter) connected between
terminal AM and 5. (For example, 60Hz or 120Hz)
Output voltage is proportional to the frequency. (Maximum output voltage is 10VDC.)
2400
(55K)
1440
(50K)
1Hz 60Hz
(initial value)
Setting range of Pr. 55
(3) Current monitoring reference (Pr. 56)
• Set the full scale value when outputting the current monitor from terminal FM or AM.
• For calibration of terminal FM, set the full-scale value of the connected current meter when the pulse speed of
terminal FM is 1440 pulse/s (50k pulse/s).
Set the current to be indicated as the full scale value on the meter (1mA analog meter) connected between terminal
FM and SD.
Pulse speed is proportional to the monitored value of output current. (Maximum pulse train output is 2400 pulse/s
(55k pulse/s).)
• For the calibration of terminal AM, set the full-scale value of the connected current meter when the output voltage
of terminal AM is 10VDC.
Set the current to be indicated as the full scale value on the meter (10VDC voltmeter) connected between terminal
AM and 5.
Output voltage is proportional to the monitored value of output current. (Maximum output voltage is 10VDC.)
2400
(55K)
1440
(50K)
Rated current
(initial value)
Setting range of Pr. 56
Output frequency 400Hz
500A
Monitor display and monitor output signal
10VDC
1Hz 60Hz
(initial value)
Setting range of Pr. 55
10VDC
Rated current
(initial value)
Setting range of Pr. 56
400Hz
500A
4
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