YASKAWA SGMJV User Manual page 350

10 Troubleshooting
10.1.2 Troubleshooting of Alarms
Alarm:
Alarm Name
A.d00:
Position Error Pulse
Overflow
(Position error exceeded
the value set in the
excessive position error
alarm level (Pn520))
A.d01:
Position Error Pulse
Overflow Alarm at
Servo ON
A.d02:
Position Error Pulse
Overflow Alarm by
Speed Limit at Servo
ON
*2
A.d10 :
Motor-load Position
Error Pulse Overflow
A.Eb1:
Safety Function Signal
Input Timing Error
A.F10:
Main Circuit Cable
Open Phase
(With the main power
supply ON, voltage was
low for more than 1 sec-
ond in an R, S, or T
phase.)
(Detected when the main
power supply was turned
ON.)
∗2. The alarm that may occur in a SERVOPACK with option module for fully-closed loop control.
10-18
Cause
The contact in the servomotor U,
V, and W wirings is faulty.
The frequency of the position ref-
erence pulse is too high.
The position reference accelera-
tion is too fast.
Setting of the Pn520 (Excessive
Position Error Alarm Level) is
low against the operating condi-
tion.
A SERVOPACK fault occurred.
The /S_ON signal is to be turned
ON when the number of position
error pulses is greater than the set
value of Pn526.
After a position error pulse has
been input, Pn529 limits the
speed if the /S_ON signal is
turned ON. If Pn529 limits the
speed in such a state, this alarm
occurs when reference pulses are
input and the number of position
error pulses exceeds the value set
for parameter Pn520 (Excessive
Position Error Alarm Level).
Motor rotation direction and
external encoder installation
direction are opposite.
Mounting of the load (e.g., stage)
and external encoder joint instal-
lation are incorrect.
The lag between activations of
the input signals /HWBB1 and
/HWBB2 for the HWBB function
is ten second or more.
The three-phase power supply
wiring is incorrect.
The three-phase power supply is
unbalanced.
A single-phase power is input
without setting Pn00B.2 (power
supply method for three-phase
SERVOPACK) to 1 (single-phase
power supply).
A SERVOPACK fault occurred.
Investigative Actions
Check the motor main circuit cable
connection.
Reduce the reference pulse fre-
quency, and operate the SERVO-
PACK.
Reduce the reference acceleration,
and operate the SERVOPACK.
Check the alarm level (Pn520) to
see if it is set to an appropriate
value.
−
Check the error counter monitor
(Un008) while the /S_ON signal is
OFF.
−
Check the servomotor rotation
direction and the external encoder
installation direction.
Check the external encoder
mechanical connection.
Measure the time lag between the /
HWBB1 and
/HWBB2 signals.
Check the power supply wiring.
Measure the voltage at each phase
of the three-phase power supply.
Check the power supply and the
parameter setting.
−
Corrective Actions
Confirm that there is no contact
fault in the motor wiring of encoder
wiring.
Reduce the position reference pulse
frequency or reference accelera-
tion. Or, reconsider the electronic
gear ratio.
Apply the smoothing function, such
as using position reference accelera-
tion/deceleration time constant
(Pn216).
Set the Pn520 to proper value.
Turn the power supply OFF and
then ON again. If the alarm still
occurs, the SERVOPACK may be
faulty. Replace the SERVOPACK.
Set position error pulses to be
cleared while the /S_ON signal is
OFF.
Or, correct the excessive position
error alarm level at servo ON
(Pn526).
Set position error pulses to be
cleared while the /S_ON signal is
OFF.
Or, correct the excessive position
error alarm level (Pn520).
Or, adjust the speed limit level at
servo ON (Pn529).
Install the external encoder in the
opposite direction, or reverse the
setting of the external encoder
usage method (Pn002.3).
Check the mechanical joints.
The output signal circuits or devices
for /HWBB1 and
/HWBB2 or the SERVOPACK
input signal circuits may be faulty.
Alternatively, the input signal
cables may be disconnected. Repair
or replace them.
Confirm that the power supply is
correctly wired.
Balance the power supply by chang-
ing phases.
Match the parameter setting to the
power supply.
Turn the power supply OFF and
then ON again. If the alarm still
occurs, the SERVOPACK may be
faulty. Replace the SERVOPACK.