Terminal Am Calibration (Calibration Parameter Pr. 645, C1 (Pr.901)) - Mitsubishi Electric FR-E700 Instruction Manual

4.12.4 Terminal AM calibration (calibration parameter Pr. 645, C1 (Pr.901))

By using the operation panel or parameter unit, you can calibrate terminal AM to full scale deflection.
Parameter
Name
Number
645 AM 0V adjustment
C1(901) AM terminal calibration
∗1
The above parameters can be set when Pr. 160 User group read selection = "0". (Refer to page 179)
∗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 parameters 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.
(1) Terminal AM bias calibration
Terminal AM
output
0
Bias calibration of output siganl
NOTE
Calibration bias and gain changes when changing the control circuit terminal block. Use Pr. 645 and C1(Pr. 901) to
calibrate again in that case.
If bias calibration (Pr. 645) is performed, make sure to perform gain calibration (C1(Pr. 901)) too.
(2) Terminal AM gain calibration (C1 (Pr. 901))
⋅ 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.
Inverter
AM
5
⋅ 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 145) 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 to "21"
(reference voltage output) and make calibration. 10VDC is output from the terminal AM.
Monitor display and monitor output signal
Initial Value
1000
—
⋅ Use Pr. 645 AM 0V adjustment to calibrate the bias side output
signal from terminal AM.
⋅ If the meter needle does not point to 0 when the analog output
from terminal AM is 0, add or decrease the Pr. 645 setting to
adjust the meter needle points to 0.
⋅ When changing ±1 in Pr. 645, the analog output changes about
±5mV.
Output
signal
(Analog output will not become lower than about -100mV even
when setting the Pr. 645 lower.)
(Pr. 645)
Terminal AM
10VDC
Setting Range
Calibrates the scale of the meter when
970 to 1200
analog output is 0.
Calibrates the scale of the meter
—
connected to terminal AM.
output
Gain calibration of output
Output
0
signal
Description
siganl (Pr. 901)
151
4