1) , the status on light’s indication
PWR: green, normal work light.
ALM: red, failure light, the motor with phase short-circuit, overvoltage and under-voltage
protection.
2) Troubles
Alarm indicator
Reasons
Measures
LED off turn
Wrong connection for
power
Check wiring of power
Low-voltages for power
Enlarge voltage of
power
Motor doesn’t run,
without holding
torque
Wrong connection of
stepper motor
Correct its wiring
RESET signal
is effective when
offline
Make RESET
ineffective
Motor doesn’t run,
but maintains holding
torque
Without input pulse
signal
Adjust PMW & signal
level
Motor runs wrong
direction
Wrong wires’
connection
Change connection for
any of 2 wires
Wrong input direction
signal
Change direction
setting
Motor’s holding
torque is too small
Too small relative to
current setting
Correct rated current
setting
