Parker Products OEM650X, OEM350X manual Symptoms Possible Causes Solutions

OEM650/OEM650X • TROUBLESHOOTING

Symptoms Possible Causes Solutions

Power LED is not	The drive is not receiving
on (illuminated)	adequate DC voltage

Verify the VDC+ and VDC- connection

Verify you power supply is producing adequate power

Verify that there is DC voltage at the drive and at the VDC+ and VDC- connection

	Drive screw are terminals loose	Tighten screws— do not tin wires
Power LED is	DC Line voltage is too low	Check DC line voltage (24VDC
flashing	I/O incorrectly connected	minimum)
	Internal damage to the drive	Remove 25-Pin D connector to isolate
		the problem
		Return drive to Compumotor for
		servicing
There is little or no	The current select resistor is not	Check for current select resistor,
holding torque; the	installed or loose	tighten screws, check wiring
power LED is on;
the motor fault LED	The incorrect current select	Verify the current selector resistor with
is off	resistor is being used	the current table— measure the resistor
		with an ohmmeter
	Jumper #1 removed and you want	Install Jumper #1. Double check the
	between 7.5A - 2.5A	desired resistor value
	Remote input activated	Remove 25-pin D connector to isolate
		the problem
	Auto standby function enabled	Check jumpers #9 and #10
The motor fault LED	The motor is not connected	Connect the motor
is on
	A motor winding is open	Measure winding continuity— check the
		series connections for an 8-leaded
		motor

The drive has detected a short circuit in the motor wiring

The drive is overheating

The drive may have internal damage

Check for miswiring— carefully check the motor wires for loose strands shorting the windings

Verify that the drives heatsink does not exceed 55°C

Return the drive to Compumotor for servicing

The motor moves	Motor current is set incorrectly	Check the current select resistor and
erratically at low		verify that the current is set correctly
speeds

Indexer pulses are being sent to the drive erratically

Verify, with an oscilloscope, that the indexer pulses are being sent at a constant rate and are not being frequency modulated

Motor resolution is set for 200 or 400 steps per revolution

Full and half step modes will cause the motor to run roughly at low speeds

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