Delta ASD-B2-0121-B, User Manual

Page: 279 / 313

Chapter 10 Troubleshooting
10-8
Revision June 2010
: Serial communication time out
Potential Cause Checking Method Corrective Actions
Setting value in time
out parameter is not
correct.
Check communication time out
parameter setting.
Correctly set P3-07.
Not receiving
communication
command for a long
time.
Check whether communication cable is
loose or broken.
Tighten the communication
cable, make sure the
communication cable is not
damaged and ensure all wiring
is correct.
: Reserve
: Input power phase loss
Potential Cause Checking Method Corrective Actions
Control power supply
is in error.
Check the power cable and
connections of R, S, T. Check whether
the power cable is loose or the
possible loss of phase on input power.
If the fault does not clear even
when the three-phase power is
connected correctly, please
contact your distributor for
assistance or contact with
Delta.
: Pre-overload warning
Potential Cause Checking Method Corrective Actions
The drive is going to
overload.
1. Check the load condition of the
servo motor and drive.
2. Check the setting value of P1-56.
Check whether the setting value of
P1-56 is to small.
1. Please refer to the
correction actions of
ALE06.
2. Increase the setting value
of P1-56 or set P1-56 to
100 and above.
: Encoder initial magnetic field error
Potential Cause Checking Method Corrective Actions
The magnetic field of
the encoder U, V, W
signal is in error.
1. Check if the servo motor is properly
grounded.
2. Check if the encoder signal cables
are placed in separate conduits from
the cables connected to R, S, T and
U, V, W terminals to prevent the
interference.
3. Check if the shielded cables are used
when performing encoder wiring.
If the error does not clear after
each checking is done, please
contact your distributor for
assistance or contact with
Delta.