Mitsubishi Electric 800 Series Instruction Manual page 290

• Calibrate the terminal CA in the following procedure.
1.
Connect a 0-20 mADC indicator (frequency meter) across terminals CA and 5 of the inverter. (Note the polarity.
The terminal CA is positive.)
2.
Set the initial value of calibration parameter Pr.930 to Pr.931. If the meter needle does not indicate zero when the
current input is at zero, calibrate the meter using Pr.930.
3.
Refer to the monitor description list
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 Pr.900.
NOTE
• When outputting such an item as the output current, which cannot reach a 100% value easily by operation, set Pr.54 to
"21" (reference voltage output) and calibrate. 20 mADC is output from the terminal CA.
• When Pr.310 Analog meter voltage output selection = "21", the terminal CA calibration cannot be performed. For details
on Pr.310, refer to the Instruction Manual of FR-A8AY.
• Output is possible from terminal CA even if Pr.930 ≥ Pr.931.
 Adjusting the response of terminal CA (Pr.869)
• Using Pr.869, the output voltage response of the terminal CA can be adjusted in the range of 0 to 5 s.
• Increasing the setting stabilizes the terminal CA output more but reduces the response level. (Setting "0" sets the response
level to 7 ms.)
 Calibration of terminal AM (Pr.901)
• Terminal AM is initially set to provide a 10 VDC output in the full-scale state of the corresponding monitor item. Pr.901
allows the output voltage ratio (gains) to be adjusted according to the meter scale. Note that the maximum output voltage
is 10 VDC.
• Calibrate the AM terminal in the following procedure.
1.
Connect a 0-10 VDC indicator (frequency meter) across terminals AM and 5 of the inverter.(Note the polarity. The
terminal AM is positive.)
2.
Refer to the monitor description list
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 10 V, using Pr.55 or Pr.56 beforehand.
3.
If the meter needle does not point to maximum even at maximum output, calibrate it with Pr.901.
NOTE
• 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 calibrate. 10 VDC is output from the terminal AM.
• When Pr.306 Analog output signal selection = "21", the terminal AM calibration cannot be performed. For details on
Pr.306, refer to the Instruction Manual of FR-A8AY.
• Use Pr.290 Monitor negative output selection to enable negative output from the terminal AM. When this is set, the
output voltage range will be -10 VDC to +10 VDC. Calibrate the terminal AM with the maximum positive output value.
(page 284) and set Pr.54.
Inverter
AM
5
(page 275) and set Pr.158 AM terminal function selection.
10 VDC
5.8 (M) Monitor display and monitor output signal
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5
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5. PARAMETERS