Section 7

Troubleshooting

Overview

The system troubleshooting procedures involve observing the status of the LED’s.

 

The tables in this section provide information related to the indications provided by

 

these devices.

Table 7-1Operation Indicators

LED

Color

Status

Comments

Power

Green

Indicates that AC power is applied and the

LED’s will flash during power up tests but only

 

 

supplies are operating.

the Power LED should remain on.

Regen

Yellow

On during Regen activity.

Should remain off. On when Regen circuit is

 

 

 

active to dump excess bus energy.

 

 

 

 

OverVoltage/

Red

Regen circuit cannot handle excess energy or

This fault condition is reset by cycling power.

INTLK

 

Interlock circuit is open.

 

 

 

 

 

Temperature

Red

On when internal heatsink temperature exceeds

This fault condition is reset by cycling power.

 

 

158° F (70° C).

Install a fan kit, reduce the load, reduce ambient

 

 

 

temperature, use the Standby current setting.

 

 

Table 7-2Axis 1 and 2 Indicators

 

 

 

 

Stepping

Green

Indicates LinStep+ is sending CW (right LED) or

Above several steps per second the LED

 

 

CCW (left LED) step pulses.

becomes continuously illuminated.

Disable/Short

Yellow

On when the Shutdown input is activated by an

This fault condition is reset by cycling power.

 

 

external control. The Shutdown signal also

To isolate the problem, disconnect and insulate

 

 

activates the Short output, but does not turn on

the motor leads from the drive connector, but

 

 

the Short LED.

leave the Interlock jumper installed. Apply

 

 

Short LED indicates that a Short Circuit or

power and step pulses. If the drive does not

 

 

Undervoltage condition has occurred. A short

invoke the short circuit fault, then it is likely that

 

 

circuit problem can occur because of shorted

the defect is in the motor, wires or the

 

 

or miswired motor leads, or internal fault.

connections at the drive.

Note: The fault LED and fault Output do NOT activate the same. The fault Output indicates that one of several fault conditions has occurred. The fault LEDs provide a means of resolving the source of the fault.

Additional Information (General)

Symptom

Possible Cause

Possible Remedies

The keypad is blank

The keypad is not receiving +5VDC.

Verify all wiring is correct.

with no backlight.

 

Verify that the +5VDC is between 4.8 and 5.2V.

Display is difficult to

Contrast ratio is incorrectly set

Adjust the contrast with the pot on the back of the keypad.

read

 

 

The ON LED is yellow.

FLASH memory is corrupt.

The operating system and user programs must be reloaded.

The ON LED is red.

A Fault has occurred.

The fault can be determined with the keypad or by using

 

 

serial status commands (SS, SA, SD).

Motor moves the wrong

Wrong Gear Ratio.

Check distance units

distance

 

 

Motor stalled.

Check motor current, inductance, anti–resonance settings

 

 

Check Speed Torque required for move, reduce

 

 

acceleration.

Motor stalls

Acceleration and/or velocity too high.

Reduce acceleration and/or velocity.

 

Motor configured incorrectly.

Check motor current, inductance and anti–resonance

 

 

settings.

Motor direction is wrong

The motor phases are miswired.

Verify connections, or swap A+ with A–.

 

The system real direction is reversed.

Change the control’s direction parameter.

The control does not re-

The keypad is disabled.

Check the switch settings on the back of the keypad.

spond to keypad input.

 

 

The motor “whines”

The inductance or anti–resonance

Verify the Inductance setting. Operation is best with motors

 

setting is incorrect.

4 mH or above. Otherwise, verify the anti–resonance setting.

MN1854

Troubleshooting 7-1

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Baldor mn1854 Section Troubleshooting, Additional Information General, 1Operation Indicators, 2Axis 1 and 2 Indicators