Mitsubishi Electric FR-F800 Series Instruction Manual page 323

 Terminal CA calibration (C0 (Pr.900), C8 (Pr.930) to C11 (Pr.931))
• Terminal CA is initially set to provide a 20 mADC output in the full-scale state of the corresponding monitor item. The
calibration parameter C0 (Pr.900) allows the output current ratio (gains) to be adjusted according to the meter scale. Note
that the maximum output current is 20 mADC.
• Set a value at the minimum current output in the calibration parameters C8 (Pr.930) and C9 (Pr.930). The calibration
parameters C10 (Pr.931) and C11 (Pr.931) are used to set a value at the maximum current output.
• Set the output signal values (output monitor set with Pr.54) at zero or at the maximum current output via terminal CA using
the calibration parameters C8 (Pr.930) and C10 (Pr.931). The full scale for each monitor is 100% at this time.
• 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 output frequency or inverter output current is selected on the monitor, set the output 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 details on
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.)
322
5. PARAMETERS
5.8 (M) Item and output signal for monitoring
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(ammeter)
(+) (-)
search engine
Analog output current
(CA)
CO (Pr.900) 20mA
100%
0
Output signal value
for zero analog current output
(C8 (Pr.930))
Analog current output value for zero output signal
(C9 (Pr.930))
Output signal value
for minimum analog output
(C10 (Pr.931))
Analog current
output value for
maximum
output signal
(C11 (Pr.931))
(initial setting)
Output signal value
page 314.)