Mitsubishi Electronics FR-E5NC 7.2 When Two or More Inverters Are Connected

HOW TO CHECK FOR ERROR USING THE LEDS

7.2 When Two or More Inverters Are Connected

The following example indicates the causes and corrective actions for faults which may be judged from the LED states of the CC-Link units (FR-E5NCs) of the inverters under the condition that the SW, M/S and PRM LEDs of the master unit are off (the master unit setting is proper) in the system configuration shown below:

Power	CPU	Master
supply		unit
			Station 1	Station 2	Station 3
			Inverter A	Inverter B	Inverter C

		LED States
Master		Inverters (FR-E5NC)					Cause	Corrective Action
unit	Station 1		Station 2		Station 3
	L. RUN "		L. RUN "		L. RUN "
TIME $	SD	"	SD	"	SD	"	Normal	
	RD	"	RD	"	RD	"
LINE $	L. ERR $		L. ERR $		L. ERR $
or
	L. RUN $		L. RUN "		L. RUN "
TIME "								Plug the FR-E5NC securely.
LINE $	SD	$	SD	"	SD	"	Poor contact of the FR-E5NC with the inverter
	RD	$	RD	"	RD	"		Check the connector.
	L. ERR $		L. ERR $		L. ERR $

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