Bose MR-J2S- B instruction manual Overload

9. TROUBLESHOOTING

Display	Name	Definition			Cause		Action
51	Overload 2	Machine collision or	1.	Machine struck something.		1.	Review operation pattern.
		the like caused max.				2.	Install limit switches.
		output current to	2.	Wrong connection of servo motor.		Connect correctly.
		flow successively for		Servo amplifier's output terminals
		several seconds.		U, V, W do not match servo
		Servo motor locked:		motor's input terminals U, V, W.
		1s or more	3.	Servo system is instable and		1.	Repeat acceleration/deceleration to
				hunting.			execute auto tuning.
						2.	Change auto tuning response setting.
						3.	Set auto tuning to OFF and make gain
							adjustment manually.
			4.	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.
52	Error excessive	Droop pulse value of	1.	Acceleration/deceleration time		Increase the acceleration/deceleration
		the deviation		constant is too small.		time constant.
		counter exceeded	2.	Torque limit value is too small.		Increase the torque limit value.
		the parameter	3.	Motor cannot be started due to		1.	Review the power supply capacity.
		No.31 setting value		torque shortage caused by power		2.	Use servo motor which provides larger
		(initial value:		supply voltage drop.			output.
		8 revolutions).	4.	Position control gain 1 (parameter		Increase set value and adjust to ensure
				No.13) value is small.		proper operation.
			5.	Servo motor shaft was rotated by		1.	When torque is limited, increase the
				external force.			limit value.
						2.	Reduce load.
						3. Use servo motor that provides larger
							output.
			6.	Machine struck something.		1.	Review operation pattern.
						2.	Install limit switches.
			7.	Encoder faulty		Change the servo motor.

8.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.

8E	Serial	Serial	1. Communication cable fault			Repair or change the cable.
	communication	communication		(Open cable or short circuit)
	error	error occurred
			2. Communication device (e.g.			Change the communication device (e.g.
		between servo
		amplifier and		personal computer) faulty		personal computer).
		communication
		device (e.g. personal
		computer).
88	Watchdog	CPU, parts faulty	Fault of parts in servo amplifier			Change servo amplifier.
					Checking method
				Alarm (88) occurs if power is
				switched on after CN1A, CN1B
				and CN3 connectors are
				disconnected.

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