Mitsubishi Electronics MR-J2S- CL specifications Troubleshooting, AL.63

11. TROUBLESHOOTING

Display	Name	Definition			Cause	Action
AL.63	Home position	In incremental	1. Positioning operation was			1. Perform home position return.
	return	system:		performed without home position		2. Review home position return speed/creep
	incomplete	1. Positioning		return.		speed/moving distance after proximity
		operation was	2. Home position return speed could			dog.
		performed without		not be decreased to creep speed.
		home position	3. Limit switch was actuated during
		return.		home position return starting at
		2. Home position		other than position beyond dog.
		return ended
		abnormally.
		In absolute position	1. Positioning operation was			1. Perform home position setting.
		detection system:		performed without home position		2. Review home position setting speed/creep
		1. Positioning		setting.		speed/moving distance after proximity
		operation was	2. Home position setting speed could			dog.
		performed without		not be decreased to creep speed.
		home position	3. Limit switch was actuated during
		setting.		home position setting starting at
		2. Home position		other than position beyond dog.
		setting ended
		abnormally.
AL.64	Home position	Home position	1. Droop pulses remaining are			Remove the cause of droop pulse
	setting error	setting could not be		greater than the in-position range		occurrence
		made.		setting.
			2. Command pulse entered after			Do not enter command pulse after clearing
				clearing of droop pulses.		of droop pulses.
			3. Creep speed high.			Reduce creep speed.
AL.8A	Serial	RS-232C or RS-422	1. Communication cable breakage.			Repair or change communication cable
	communication	communication	2. Communication cycle longer than			Set correct value in parameter.
	time-out error	stopped for longer		parameter No. 23 setting.
		than the time set in	3. Wrong protocol.			Correct protocol.
		parameter No.23.
AL.8E	Serial	Serial	1. Communication cable fault			Repair or change the cable.
	communication	communication error		(Open cable or short circuit)
	error	occurred between
			2. Communication device (e.g.			Change the communication device (e.g.
		servo amplifier and
				personal computer) faulty		personal computer).
		communication
		device (e.g. personal
		computer).
88888	Watchdog	CPU, parts faulty	Fault of parts in servo amplifier			Change servo amplifier.
					Checking method
				Alarm (88888) occurs if power is
				switched on after disconnection
				of all cables but the control
				circuit power supply cables.

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