Mitsubishi FR - S500 instruction manual Indicator connection and adjustment, Japanese version FM

1.7.4 Indicator connection and adjustment

(1) Japanese version (FM)

The output frequency, etc. of the inverter can be indicated by a DC ammeter of 1mA full-scale deflection and maximum 300Ω internal resistance or a commercially available digital indicator which is connected across terminals FM-SD.

The indicator can be calibrated from the operation panel or parameter unit. Note that the reading varies according to the wiring distance if the indicator is placed away from the inverter. In this case, connect a calibration resistor in series with the indicator as shown below and adjust until the reading matches the operation panel or parameter unit indication (indicator monitoring mode).

Install the indicator within 200m (656.16feet) (50m (164.04feet) for the digital indicator) of the inverter and connect them by at least 0.3mm2 twisted or shielded cables.

Inverter	Calibration resistor*		Inverter
					1440 pulses/s
FM	1mA	(+)		FM
		Analog
		indicator
SD		(-)		SD	Digital indicator
		(1mA full-scale)

Types of Indicators Connected

REMARKS

*Not needed when calibration is made using the calibration parameter C1 "FM terminal calibration". This resistor is used when calibration must be made near the frequency meter for such a reason as a remote frequency meter. Note that the needle of the frequency meter may not deflect to full-scale when the calibration resistor is connected. In this case, use both the resistor and calibration parameter "C1".

CAUTION

•Refer to page 111 for the procedure of indicator adjustment.

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