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Monitor display and monitor output signal
4.11.4 Terminal AM calibration (calibration parameter C1 (Pr.901))
(1) Terminal AM gain calibration (C1 (Pr. 901))
⋅ Calibrate the terminal AM gain 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 (page 128) 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.
By using the operation panel or parameter unit, you can calibrate terminal AM to full scale deflection.
Parameter
Number
Name Initial Value Setting Range Description
C1 (901) AM terminal calibration
——
Calibrates the scale of the meter
connected to terminal AM.
∗1 The above parameter can be set when Pr. 160 Extended function display selection = "0". (Refer to page 162)
∗2 The parameter number in parentheses is the one for use with the operation panel (PA02) for the FR-E500 series or parameter unit (FR-PU04/FR-PU07).
∗3 The above parameter allow its setting to be changed during operation in any operation mode even if "0" (initial value) is set in Pr. 77 Parameter write
selection.
⋅ 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.
REMARKS
When outputting such an item as the output current, which cannot reach a 100% value easily by operation, set Pr. 158 to "21"
(reference voltage output) and make calibration. 10VDC is output from the terminal AM.
AM
Inverter
10VDC
5
Terminal AM
output
Output
signal
0
Gain calibration of output
siganl (Pr. 901)