Mitsubishi Electric fr-e700 series, Instruction Manual

Page: 305 / 608

Parameter Monitor display and monitor output signals
FR-E700 SC EC/ENE 6 - 151
Terminal AM gain calibration [C1 (Pr. 901)]
Terminal AM is factory-set to provide a 10 V DC output in the full-scale status of the corresponding
monitor item. Calibration parameter C1 (Pr. 901) allows the output voltage ratios (gains) to be adjust-
ed according to the meter scale. Note that the maximum output voltage is 10 V DC, the maximum out-
put current 1mA.
Calibrate the terminal AM gain in the following procedure:
햲
Connect an 0–10 V DC voltmeter to inverter terminals AM and 5, taking care to correct with the
correct polarity. AM is positive.
햳
Set Pr. 158 to select the monitor signal you want to output to analog output AM (refer to page 6-148).
To display the output frequency or the output current set Pr. 55 or Pr. 56, respectively, to the
maximum frequency or current value for which you want to output 10 V to the terminal.
햴
Start the frequency inverter in PU mode with the operation panel or the control terminals (external
operation).
햵
Calibrate the full deflection of the meter by setting C1 (Pr. 901) and then operating the digital dial.
Note that the value shown on the operating panel for the monitor signal associated with C1 does
not change when you turn the digital dial, but the analog voltage output to AM will change as
you turn the dial. Confirm the calibration value found by pressing the SET key (this assigns the
maximum voltage output to the displayed value of the monitor signal.)
Fig. 6-76:
Connecting an analog meter to the AM output
I001168C
Fig. 6-77:
Terminal AM gain calibration
I001932E
NOTE If it is not possible output the signal to be measured for calibration at its maximum value you can
set Pr. 158 to "21". This outputs a continuous signal of approx. 10 V to terminal AM, which makes it
possible to calibrate the maximum value on the meter. When C1 is used to calibrate the full meter
deflection in this mode a value of "1000" is displayed. Afterwards you can then reset Pr. 158 to the
required monitor signal setting.
10 V DC
Output
signal
Gain calibration of
output signal
(Pr. 901)
Terminal AM
output