Mitsubishi Electric 800 Series Instruction Manual (Function page 323

• Enter the full-scale value of the torque meter corresponding to a voltage of 10 VDC output via terminal AM. Enter the torque
value at full scale of the meter (10 VDC voltmeter) installed between terminal AM and terminal 5. Output voltage is
proportional to the torque monitored. (The maximum output voltage is 10 VDC.)
 Terminal FM pulse train output
• The maximum pulse train output of terminal FM is 8 VDC 2400 pulses/s.
The pulse width can be adjusted on the operation panel by using the calibration parameter C0 (Pr.900) FM terminal
calibration.
• A 1 mA full-scale DC ammeter or a digital meter can be used to give commands (such as inverter output frequency
command).
FM output circuit
Inverter
24V
2.2K
3.3K
FM
20K
SD
FM
Calibration
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, use the resistor and
operation panel together.
*2 In the initial setting, 1 mA full-scale and 1440 pulses/s terminal FM are used at 60 Hz.
322
13. (M) Item and Output Signal for Monitoring
13.3 Monitor display selection for terminals FM and AM
Indicator
1mA full-scale
analog meter
1mA
(+) (-)
*1
8VDC
Set with Pr.56 (current monitor)
FM
T1
SD
T2
(Digital indicator)
1440 pulses/s(+) (-)