Mitsubishi Electric FR-A820-00046 (0.4K) Instruction Manual page 444

• Set the output current values (output monitor set with Pr.54) at zero and at the maximum current output via terminal CA
(using the calibration parameters C9 (Pr.930) and C11 (Pr.931). The output current calibrated by the calibration parameter
C0 (Pr.900) is 100% at this time.
0 to 20mADC
CA
(+)
5
• Calibrate the output via terminal CA in the following procedure.
1.
Connect a 0-20 mADC indicator (frequency meter) across terminals CA and 5 on the inverter. (Note the polarity.
Terminal CA is positive.)
2.
Set the initial value of the calibration parameter C8 (Pr.930) to C11 (Pr.931). If the meter needle does not indicate
zero when the current input is at zero, calibrate the meter using C8 (Pr.930) and C9 (Pr.930).
3.
Set a monitor item in Pr.54 FM/CA terminal function selection. (Refer to
When the running frequency or inverter output current is selected on the monitor, set the running frequency or
current value at which the output signal will be 20 mA, using Pr.55 or Pr.56 beforehand.
4.
If the meter needle does not point to maximum even at maximum output, calibrate it with C0 (Pr.900).
NOTE
• When outputting an item such as output current, which cannot reach a 100% value easily by operation, set Pr.54 to "21"
(reference voltage output) and calibrate. A current of 20 mADC is output via terminal CA.
• When Pr.310 Analog meter voltage output selection = "21", the output via terminal CA cannot be calibrated. For the details
of Pr.310, refer to the Instruction Manual of the FR-A8AY.
• The output via terminal CA is enabled even if C8 (Pr.930) ≥ C10 (Pr.931), C9 (Pr.930) ≥ C11 (Pr.931).
 Adjusting the response of terminal CA (Pr.869)
• Using Pr.869, the output voltage response of terminal CA can be adjusted in the range of 0 to 5 seconds.
• Increasing the setting stabilizes the output via terminal CA more but reduces the response level. (Setting "0" sets the
response level to 7 ms.)
 Calibration of terminal AM (C1 (Pr.901))
• Adjusting the response of terminal CA (C1(Pr.901))
Terminal AM is initially set to provide a 10 VDC output in the full-scale state of the corresponding monitor item. The
calibration parameter C1 (Pr.901)AM terminal calibration allows the output voltage ratio (gains) to be adjusted according
to the meter scale. Note that the maximum output voltage is 10 VDC.
Inverter
AM
5
• Calibrate the output via terminal FM in the following procedure.
(ammeter)
Analog output current
(-)
CO (Pr.900)
100%
10VDC
Output signal value
for minimum analog output
(C10 (Pr.931))
(CA)
20mA
0
Output signal value
for zero analog current output
(C8 (Pr.930))
Analog current output value for zero output signal
(C9 (Pr.930))
page
5.11 (M) Item and output signal for monitoring
Analog current
output value for
maximum
output signal
(C11 (Pr.931))
Output signal value
435.)
5. PARAMETERS
1
2
3
4
5
6
7
8
9
10
443