Installation manual

GEO Direct PWM Amplifiers – Preliminary Documentation

Troubleshooting 35

TROUBLESHOOTING

Error Codes

In most cases, the GEO Drive communicates error codes with a text message via the serial port to the

host. Some error codes are also transmitted to the Status Display. The same message is saved in the

EEPROM under an error history log (FLTHIST, ERR) so nothing is lost when power is removed. Not all

errors reflect a message back to the host. In these cases, the no-message errors communicate only to the

Status Display.

The response of the GEO Drive to an error depends on the error's severity. There are two levels of

severity:

1. Warnings (simply called errors and not considered faults and do not disable operation).

2. Fatal errors (fatal faults that disable almost all drive functions, including communications).

Note

The GEO Drive automatically disables at the occurrence of a fault.

PWM Status Display Codes

The 7-segment display on the current model provides the following codes:

Display Description Cause

0 Normal Operation

1 Time Based Over Current on Axis 1 An internal timer has noticed that Axis 1 is taking more RMS current

than the drive was designed to produce. Reduce loading.

2 Over Current – Axis 1. Over Current sensors have detected an excess of current through the

motor leads. Typically, a shorted motor, shorted cable, extremely

excessive current, or voltage commands from the controller through the

power stage. The controller is the PMAC controller.

3 PWM Over Frequency Axis 1 PMAC or UMAC setup is incorrect. The I-variables for the phase clock

frequency and PWM frequencies should be adjusted to under 16 kHz.

4 Power Stage Over Temp Axis 1. Heat sink temperature is above a factory pre-set range (approximately

75 ºC). Drawing excessive current through the amplifier, blocked

airflow through the amplifier or operation in an ambient temperature

above 45 ºC.

5 Motor Over Temp Axis 1 Normally-closed input on the front of the GEO drive amplifier

connector X3 is detected in open circuit between pins 3 and 4.

6 Over Current – Axis 2. Over Current sensors have detected an excess of current through the

motor leads. An internal timer has noticed that Axis 2 is taking more

RMS current than the drive was designed to produce. Reduce loading.

7 Over Current Axis 2. Over Current sensors have detected an excess of current through the