Mitsubishi Electronics MR-J2S- A AL.35 Command Input pulse Pulse frequency of the command

10. TROUBLESHOOTING

Display	Name	Definition		Cause	Action
AL.35	Command	Input pulse	1.	Pulse frequency of the command	Change the command pulse frequency to a
	pulse frequency	frequency of the		pulse is too high.	proper value.
	error	command pulse is	2. Noise entered command pulses.		Take action against noise.
		too high.	3.	Command device failure	Change the command device.
AL.37	Parameter	Parameter setting is	1.	Servo amplifier fault caused the	Change the servo amplifier.
	error	wrong.		parameter setting to be rewritten.
			2.	Regenerative brake option not	Set parameter No.0 correctly.
				used with servo amplifier was
				selected in parameter No.0.
AL.45	Main circuit	Main circuit device	1.	Servo amplifier faulty.	Change the servo amplifier.
	device overheat	overheat	2.	The power supply was turned on	The drive method is reviewed.
				and off continuously by overloaded
				status.
			3.	Air cooling fan of servo amplifier	Repair the cooling fan of the servo
				stops.	amplifier.
AL.46	Servo motor	Servo motor	1.	Ambient temperature of servo	Review environment so that ambient
	overheat	temperature rise		motor is over 40 .	temperature is 0 to 40 .
		actuated the	2.	Servo motor is overloaded.	1. Reduce load.
		thermal protector.			2. Review operation pattern.
					3. Use servo motor that provides larger
					output.
			3.	Thermal protector in encoder is	Change servo motor.
				faulty.

AL.50

Overload 1

Load exceeded overload protection characteristic of servo amplifier. Load ratio 300%:

2.5s or more

Load ratio 200%: 100s or more

1.	Servo amplifier is used in excess	1.	Reduce load.
	of its continuous output current.	2.	Review operation pattern.
		3. Use servo motor that provides larger
			output.
2.	Servo system is instable and	1.	Repeat acceleration/
	hunting.		deceleration to execute auto tuning.
		2.	Change auto tuning response setting.
		3.	Set auto tuning to OFF and make gain
			adjustment manually.
3.	Machine struck something.	1.	Review operation pattern.

2.Install limit switches.

4.Wrong connection of servo motor. Connect correctly. Servo amplifier's output terminals

U, V, W do not match servo motor's input terminals U, V, W.

5. Encoder faulty.			Change the servo motor.
		Checking method
	When the servo motor shaft is
	rotated slowly with the servo off,
	the cumulative feedback pulses
	should vary in proportion to the
	rotary angle. If the indication
	skips or returns midway, the
	encoder is faulty.

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