Baldor mn1854 manual Additional Information, Troubleshooting MN1854

Additional Information Continued

Symptom	Possible Cause	Possible Remedies
No RS232 commu-	If the keypad works, the RS232 port	Refer to Section 5, “Configure Serial Communications”.
nication but keypad	is working. Something else is wrong	Verify PC COM port is set to 9600 baud, 8 data bits 1 stop bit,
works.	(wiring, configuration, address).	no parity.
RS232 communica-	The keypad is disabled.	Verify that you do not have an RS485 version.
tion and keypad do		Enable the keypad by the switch on back of keypad.
not work.
	The serial port is not working.	Contact Baldor.
“Hit A Limit”	A limit switch has been activated.	Either the motion commanded was not correct, or the EOT
		switch is incorrectly positioned on your system.
“Amplifier Fault”	Multiple drive faults have occurred.	The fault can be determined with the keypad or by using serial
		status commands (SS, SA, SD).
“Over Temperature	Internal Fan is not operating or	Remove obstruction, or clean tunnel by removing unit, use
Fault”	Heatsink Tunnel is clogged or	screwdriver to prevent the fan from turning, and blow shop
	restricted.	air through the tunnel. Return unit to installation.
	Ambient air in cabinet is too hot.	If multiple units are installed within the enclosure, ventilation
		must be adequately to remove heat.
	The fan does not operate.	With power off, verify the internal fan connections. If properly
		connected, the fan may have failed. Contact Baldor.
“Over Current Fault”	Motor is miswired or damaged. The	With power off verify all connections.
	LinStep+ has short circuit protection,	Verify current setting is correct for the motor rating.
	but you must correct the problem to	Verify the motor phases are not open or shorted (phase to
	clear the fault.	phase and phase to ground). The resistance in each phase
		should be about the same and only a few ohms. If the
		phases are open or have a large resistance, the motor is
		probably damaged and should be replaced.
“Over Voltage Fault”	Excessive bus voltage. Usually	Eliminate the regen event by reducing the load or make the
	caused by a regen condition that	move less aggressively by reducing the commanded
	overwhelms the internal power	acceleration or velocity.
	dump circuit.
	It can also be caused by high line	Verify AC line voltage is within the limits.
	voltage, or voltage spikes.
“Interlock Fault”	Motor connector does not have an	Connect motor connector with Interlock.
	interlock jumper, or motor has been
	disconnected.
“Following Error”	Motor stalled.	Confirm proper motor configuration (current, AR, mH).
		Make a less aggressive move.
	Wrong encoder resolution set.	Verify the encoder settings are correct. Incorrect settings can
		cause a following error.
“Encoder Wired	Encoder position is changing opposite	Verify motor and encoder wiring. Reverse phases of either
Backwards”	the commanded move.	motor or encoder. Contact Baldor for assistance.
“Encoder Fault”	Attempted closed loop motion and	Verify encoder wiring.
	encoder position is unchanged.
“Error Finding Home”	Both EOT switches were activated	Verify home switch connections and configuration (NORM
	without finding the home switch.	OPEN or NORM CLOSED).
“Invalid Program”	Attempted to “call” an empty program	Verify program number, or define program “called”.
	(i.e. GT, GS).
“Program Too Large”	Program length exceeds 1024 bytes.	Divide program into smaller programs or reduce program size.
“Insufficient Memory”	All stored user programs exceed 60K.	Reduce program size, or delete programs.
“Invalid Program #”	Program number exceeds 400 or	Verify program name and number.
	program name does not exist.

7-2 Troubleshooting MN1854