Mitsubishi Electric 700 Series Installation Manualline page 36

FR-A770 DEDICATED SPECIFICATIONS
7.6.2 AM terminal calibration (C1 (Pr. 901))
Inverter
AM
5
Calibrate the AM terminal in the following procedure.
1)Connect a 0-10VDC meter (frequency meter) to across inverter terminals AM-5. (Note the polarity. The terminal AM is
positive.)
2)Refer to the monitor description list (Refer to the A700 Instruction Manual (Applied)) and set Pr. 158.
When you selected the running frequency, inverter output current, etc. as monitor, preset in Pr. 55 or Pr. 56 the
running frequency or current value at which the output signal will be 10V.
3)When outputting the item that cannot achieve a 100% value easily by operation, e.g. output current, set "21"
(reference voltage output) in Pr. 158 and perform the following operation. After that, set "2" (output current, for
example) in Pr. 158.
Remarks
When outputting such an item as the output current, which cannot reach a 100% value easily by operation, set
Pr. 158 = "21" (reference voltage output) and make calibration. 10VDC is output from the terminal AM.
31
Terminal AM is factory-set to provide a 10VDC output in the full-
scale status of the corresponding monitor item. Calibration
parameter C1 (Pr. 901) allows the output voltage ratios (gains) to
be adjusted according to the meter scale. Note that the maximum
output voltage is 10VDC.
10VDC