Adjustment Of Terminal Fm And Terminal Am - Mitsubishi Electric 800 Series Instruction Manual

11.4

Adjustment of terminal FM and terminal AM

By using the operation panel, you can adjust (calibrate) terminal FM and terminal AM to full-scale deflection.
Pr. Name
C0 (900)
FM terminal calibration
*1*2
M310
C1 (901)
AM terminal calibration
*1*3
M320
867
AM output filter
*3
M321
1200
AM output offset calibration 3000
*3
M390
*1 On the LCD operation panel used as the command source, the parameter number in parentheses appears instead of that starting with the letter C.
*2 The setting is available only for the FR-E800-1.
*3 The setting is available only for the FR-E800-4 and FR-E800-5.
 Terminal FM calibration (C0 (Pr.900)) (FM type only)
• The output via terminal FM is set to the pulse output. By setting C0 (Pr.900), the meter connected to the inverter can be
calibrated by parameter setting without use of a calibration resistor.
• The pulse train output via terminal FM can be used for digital display on a digital counter. The output is 1440 pulses/s at
full scale. (Refer to page 245
1mA
FM
(+)
Calibration
*1
resistor
SD
Pulse width T1: Adjust using calibration parameter C0
Pulse cycle T2: Set with Pr.55 (frequency monitor)
*1 Not required when calibrating with operation panel.
Use a calibration resistor when the indicator (frequency meter) needs to be calibrated by a neighboring device because the indicator is located
far from the inverter.
However, the frequency meter needle may not deflect to full-scale if the calibration resistor is connected. In this case, perform calibration using
the operation panel.
*2 In the initial setting, 1 mA full-scale and 1440 pulses/s terminal FM are used at 60 Hz.
• Calibrate the output via terminal FM in the following procedure.
1.
Connect an indicator (frequency meter) across terminals FM and SD on the inverter. (Note the polarity. Terminal FM
is positive.)
2.
When a calibration resistor has already been connected, adjust the resistance to "0" or remove the resistor.
3.
Set a monitor item in Pr.54 FM 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 1440 pulses/s, using Pr.55 Frequency monitoring reference or Pr.56
Current monitoring reference beforehand. Normally, at 1440 pulses/s the meter deflects to full-scale.
4.
If the meter needle does not point to maximum even at maximum output, calibrate it with C0 (Pr.900).
Initial value Setting range
— —
— —
0.01 s 0 to 5 s
2700 to 3300
for the full-scale value of each monitor item.)
Indicator
1mA full-scale
analog meter
(-) T1
8VDC
T2
Set with Pr.56 (current monitor)
Description
Calibrates the scale of the meter connected to terminal FM.
Calibrates the scale of the analog meter connected to terminal
AM.
Set a filter for output via terminal AM.
Calibrates the scale of the meter when the analog output is 0.
1440 pulses/s(+)
FM
SD
page 245.)
11.(M) Item and Output Signal for Monitoring
11.4 Adjustment of terminal FM and terminal AM
(Digital indicator)
(-)
249
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