Yaskawa SGDH Linear Sigma Series - Manual (Page 366)

11 Inspection, Maintenance, and Troubleshooting
11.1.5 Troubleshooting of Alarm and Warning
11-14
A.Cb Encoder
Echoback Error Occurred when the
control power sup-
ply was turned ON
or during operation. The serial converter unit wiring and contact are
incorrect. Correct the serial converter unit wiring.
Noise interference occurred due to incorrect serial
converter unit cable specifications. Use tinned annealed copper twisted-pair or
twisted-pair shielded wire with a core of at least
0.12 mm
2 (0.0002 in 2 ).
Noise interference occurred because the wiring dis-
tance for the serial converter unit cable is too long. The wiring distance must be 20m (65.6 ft) max.
Noise interference occurred on the signal line,
because the serial converter unit cable is bent and
the sheath is damaged. Correct the serial converter unit cable layout.
The serial converter unit cable is bundled with a
high-current line or near a high-current line. Correct the serial converter unit cable layout so
that no surge is applied.
The FG electrical potential varies because of the
influence from such machines on the servomotor
side as welders. Ground the machine separately from PG side FG.
Noise interference occurred on the signal line from
the serial converter unit. Take measures against noise for the serial con-
verter unit wiring.
Excessive vibration and shocks to the serial con-
verter unit was applied. Reduce the machine vibration or mount the serial
converter unit securely.
A serial converter unit fault occurred. Replace the serial converter unit.
A SERVOPACK board fault occurred. Replace the SERVOPACK.
A.d0 Position Error
Pulse Overflow
(In servo ON
status, the
position error
pulses exceed the
overflow level set
in the parameter
Pn505.) Occurred when the
control power sup-
ply was turned ON. The overflow level (Pn505) is incorrect. Make the value set in the Pn505 to other than 0.
A SERVOPACK board fault occurred. Replace the SERVOPACK.
Occurred at the ser-
vomotor high-speed
movement. The contact in the servomotor U, V, and W wirings
is faulty. Correct the servomotor wiring.
Correct the encoder wiring.
A SERVOPACK board fault occurred. Replace the SERVOPACK.
The servomotor did
not run with posi-
tion reference input. Wirings of the servomotor U, V, and W are incorrect. Correct the servomotor wiring.
A SERVOPACK board fault occurred. Replace the SERVOPACK.
Normal movement,
but occurred with a
long distance refer-
ence input. The SERVOPACK gain adjustment is improper. Increase the speed loop gain (Pn100) and position
loop gain (Pn102).
The V-REF input voltage and the Pn300 setting are
incorrect. Lower the reference speed to the speed limit
value.
The position reference pulse frequency is too high. Adjust slowly the position reference pulse fre-
quency.
Apply the smoothing function.
Correct the electronic gear ratio.
Setting of the position error pulse overflow alarm
level (Pn505) is incorrect. Set the parameter Pn505 to proper value.
The servomotor specifications do not meet the load
conditions such as force and mass. Reconsider and correct the load and servomotor
capacity.
A.d3 Exceeded
Position Data Occurred when the
control power sup-
ply was turned ON
or during operation. Position data is 32-bit or more. Narrow the movable range of the linear servomo-
tor.
A.F1 Power Line
Open Phase
(In the main
power supply ON
status, the voltage
stays low for 1
second or more at
one of the phases
R, S, and T.)
(Detected when
the main circuit
power supply
turns ON.) Occurred when the
control power sup-
ply was turned ON. A SERVOPACK fault occurred. Replace the SERVOPACK.
Occurred when the
main circuit power
supply was turned
ON. The three-phase power supply wiring is incorrect. Correct the power supply wiring.
The three-phase power supply is unbalanced. Balance the power supply by changing phases.
A SERVOPACK fault occurred. Replace the SERVOPACK.
Occurred when the
servomotor was
running. The contact in three-phase power supply wiring is
faulty. Correct the power supply wiring.
Three-phase power supply is unbalanced. Balance the power supply.
A SERVOPACK fault occurred. Replace the SERVOPACK.
Table 11.5 Alarm Display and Troubleshooting (Cont’d)
Alarm
Display
Alarm Name Situation at Alarm
Occurrence
Cause Corrective Actions