Mitsubishi Electronics MR-J2S- CL specifications

11. TROUBLESHOOTING

Display	Name	Definition				Cause	Action
AL.17	Board error	CPU/parts fault	Faulty parts in the servo amplifier				Change the servo amplifier.
AL.19	Memory error 3	ROM memory fault			Checking method
				Alarm (A.17 or A.18) occurs
				if power is switched on after
				disconnection of all cables
				but the control circuit power
				supply cables.
AL.1A	Motor	Wrong combination	Wrong combination of servo amplifier				Use correct combination.
	combination	of servo amplifier	and servo motor connected.
	error	and servo motor.
AL.20	Encoder error 2	Communication	1.	Encoder connector (CN2)			Connect correctly.
		error occurred		disconnected.
		between encoder and	2.	Encoder fault			Cange the servo motor.
		servo amplifier.	3.	Encoder cable faulty			Repair or change the cable.
				(wire breakage or shorted)
AL.24	Main circuit	Ground fault	1.	Power input wires and servo motor			Connect correctly.
	error	occurred at the servo		output wires are in contact at main
		motor outputs (U,V		circuit terminal block (TE1).
		and W phases) of the	2.	Sheathes of servo motor power			Change the cable.
		servo amplififer.		cables deteriorated, resulting in
				ground fault.
			3.	Main circuit of servo amplifier			Change the servo amplifier.
				failed.
					Checking method
				AL.24 occurs if the servo is
				switched on after disconnecting
				the U, V, W power cables from
				the servo amplifier.
AL.25	Absolute	Absolute position	1.	Reduced voltage of super capacitor			After leaving the alarm occurring for a few
	position erase	data in error		in encoder			minutes, switch power off, then on again.
							Always make home position setting again.
			2.	Battery voltage low			Change battery.
			3.	Battery cable or battery is faulty.			Always make home position setting again.
		Power was switched	4.	Super capacitor of the absolute			After leaving the alarm occurring for a few
		on for the first time		position encoder is not charged			minutes, switch power off, then on again.
		in the absolute					Always make home position setting again.
		position detection
		system.
AL.30	Regenerative	Permissible	1.	Wrong setting of parameter No. 0			Set correctly.
	alarm	regenerative power	2.	Built-in regenerative brake resistor			Connect correctly
		of the built-in		or regenerative brake option is not
		regenerative brake		connected.
		resistor or	3.	High-duty operation or continuous			1. Reduce the frequency of positioning.
		regenerative brake		regenerative operation caused the			2. Use the regenerative brake option of
		option is exceeded.		permissible regenerative power of			larger capacity.
				the regenerative brake option to be			3. Reduce the load.
				exceeded.
					Checking method
				Call the status display and check
				the regenerative load ratio.
			4.	Power supply voltage is abnormal.			Review power supply
				MR-J2S-		CL:260VAC or more
				MR-J2S-		CL1:135VAC or more
			5.	Built-in regenerative brake resistor			Change servo amplifier or regenerative
				or regenerative brake option			brake option.
				faulty.
		Regenerative	6.	Regenerative transistor faulty.			Change the servo amplifier.
		transistor fault			Checking method
				1) The regenerative brake option
				has overheated abnormally.
				2) The alarm occurs even after
				removal of the built-in
				regenerative brake resistor or
				regenerative brake option.

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