Mitsubishi Electronics MR-J2S- A instruction manual Remedies for warnings, Al.Ea Abs

10. TROUBLESHOOTING

Display	Name	Definition			Cause	Action
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 CN1A, CN1B
				and CN3 connectors are
				disconnected.

10.2.3 Remedies for warnings

If AL.E6 or AL.E9 occurs, the servo off status is established. If any other warning occurs, operation can be continued but an alarm may take place or proper operation may not be performed. Eliminate the cause of the warning according to this section. Use the optional servo configuration software to refer to the cause of warning.

Display	Name	Definition					Cause	Action
AL.92	Open battery	Absolute position	1.	Battery cable is open.				Repair cable or changed.
	cable warning	detection system battery	2.	Battery voltage dropped to 2.8V or less.				Change battery.
		voltage is low.
AL.96	Home position	Home position setting	1.	Droop pulses remaining are greater				Remove the cause of droop pulse
	setting warning	could not be made.		than the in-position range setting.				occurrence
			2.	Command pulse entered after clearing				Do not enter command pulse
				of droop pulses.				after clearing of droop pulses.
			3.	Creep speed high.				Reduce creep speed.
AL.9F	Battery warning	Voltage of battery for	Battery voltage fell to 3.2V or less.					Change the battery.
		absolute position
		detection system reduced.
AL.E0	Excessive	There is a possibility that	Regenerative power increased to 85% or					1. Reduce frequency of
	regenerative	regenerative power may	more of permissible regenerative power of					positioning.
	warning	exceed permissible	built-in regenerative brake resistor or					2. Change regenerative brake
		regenerative power of	regenerative brake option.					option for the one with larger
		built-in regenerative					Checking method	capacity.
		brake resistor or			Call the status display and check			3. Reduce load.
					regenerative load ratio.
		regenerative brake
		option.
AL.E1	Overload	There is a possibility that	Load increased to 85% or more of overload					Refer to AL.50, AL.51.
	warning	overload alarm 1 or 2	alarm 1 or 2 occurrence level.
		may occur.				Cause, checking method
					Refer to AL.50,51.
AL.E3	Absolute position	Absolute position encoder	1. Noise entered the encoder.					Take noise suppression
	counter warning	pulses faulty.						measures.
			2.	Encoder faulty.				Change servo motor.
AL.E5	ABS time-out		1.	PC lader program wrong.				Contact the program.
	warning		2.	ST2 TLC signal mis-wiring				Connect properly.
AL.E6	Servo emergency	EMG-SG are open.	External emergency stop was made valid.					Ensure safety and deactivate
	stop		(EMG-SG opened.)					emergency stop.
AL.E9	Main circuit off	Servo was switched on						Switch on main circuit power.
	warning	with main circuit power
		off.
AL.EA	ABS	Servo-on signal (SON)	1.	PC ladder program wrong.				1. Correct the program.
	servo-on warning	turned on more than 1s
			2.	SON signal mis-wiring.				2. Connect properly.
		after servo amplifier had
		entered absolute position
		data transfer mode.

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