Manual

72 Drive for stepper motors
8 Diagnostics and troubleshooting SD315O
0098441113480, V2.00, 03.2011
8.2 Troubleshooting
Resetting an error message After you have fixed the cause of the error, reset the error message with
a falling edge at the signal input ENABLE.
Error Cause Troubleshooting
Motor does not rotate and
has no holding torque.
Motor phase interrupted Check motor cable and connection. One or
more motor phases are not connected.
Signal input ENABLE is inactive. Enable the power stage
Motor does not rotate, but
has holding torque
Motor mechanically blocked. Check coupled components.
Holding brake applied. Check the holding brake controller
Motor rotates irregularly. Overload. Reduce load.
Motor damaged. Replace motor.
Motor rotates in the wrong
direction.
Motor phases are inverted. Check motor phases.
Signal input DIR has incorrect level. Check signal input.
LED flash code A No power stage supply. Check power stage supply.
LED flash code E Reserved. Reserved.
LED flash code F Power stage overtemperature (>90 °C). Check the temperature in the control cabinet.
Check the motor phase current.
LED flash code G Overvoltage (>60 V
dc
), also in case of regen-
eration conditions.
If necessary, use a braking resistor controller
(such as UBC60).
Error message must be reset.
LED flash code E Undervoltage (<18 V
dc
). Check power supply.
Error message must be reset.
LED flash code J Frequency of the external reference values
too high.
Check the frequency.
LED flash code A Short circuit between two motor phases Check connections.
Error message must be reset.