Siemens SIMATIC SIMOSTEP 1FL3041 Functional Description page 43

02.05
Other malfunctions
which are not
indicated
!
© Siemens AG 1998 All Rights Reserved
FM-STEPDRIVE/SIMOSTEP (FB)
Malfunction Cause
None of the LEDs Mains voltage not
light available
Motor does not PWM signal input active
rotate and does not
have a holding
torque
Motor line(s) interrupted
Motor does not No clock signal present
rotate but does on PULSE input
have a holding
torque
Motor turns in Motor phases
incorrect direction interchanged
DIR signal input set
incorrectly
Motor torque is too Motor phase current set
low (motor slips) too low
Acceleration ramp too
steep
The drive is
mechanically blocked
Connected motor's rating
is insufficient
Caution
Before replacing the power controller, check motor and wiring for a
ground fault!
8 Status indicators and troubleshooting
Rectification
Check mains voltage
and mains connection
wiring.
Set PWM input to
inactive.
With the mains voltage
disconnected, check the
motor wiring.
Supply clock signal to
PULSE input.
Connect the motor
phases properly.
Invert signal on DIR
input.
Set phase current
correctly.
Reduce acceleration
ramp on control unit.
Eliminate mechanical
blocking.
Connect a more powerful
motor.
8-3