YASKAWA SGD7S-R70A Product Manual page 193

Problem Possible Cause
The safety input signals
(/HWBB1 or /HWBB2) were
not turned ON.
A failure occurred in the SER-
VOPACK.
Servomotor
Does Not
Start
The polarity detection was
not executed.
There is a mistake in the Ser-
vomotor wiring.
There is a mistake in the wir-
ing of the encoder or Serial
Converter Unit.
There is a mistake in the lin-
Servomotor
ear encoder wiring.
Moves
The setting of Pn282 (Linear
Instanta-
Encoder Pitch) is not correct.
neously,
and Then
The count-up direction of the
Stops
linear encoder does not
match the forward direction
of the Moving Coil in the
motor.
Polarity detection was not
performed correctly.
Servomotor
There is a faulty connection
Operation Is
in the Servomotor wiring.
Unstable
8.3 Troubleshooting Based on the Operation and Conditions of the Servomotor
Confirmation
Check the /HWBB1 and
/HWBB2 input signals.
–
Check the setting of
Pn080 =n.X (Polar-
ity Sensor Selection).
Check the /S-ON (Servo
ON) signal.
Turn OFF the power sup-
ply to the servo system.
Check the wiring.
Turn OFF the power sup-
ply to the servo system.
Check the wiring.
Turn OFF the power sup-
ply to the servo system.
Check the wiring.
Check the setting of
Pn282.
Check the directions.
Check to see if electrical
angle 2 (electrical angle
from polarity origin) at any
position is between ±10°.
The connector connec-
tions for the power line
(U, V, and W phases) and
the encoder or Serial
Converter Unit may be
unstable. Turn OFF the
power supply to the servo
system. Check the wiring.
Continued from previous page.
Correction Reference
Turn ON the /HWBB1
and /HWBB2 input sig-
nals. If you are not
using the safety func-
–
tion, connect the Safety
Jumper Connector
(provided as an acces-
sory) to CN8.
Turn OFF the power
supply to the servo
–
system. Replace the
SERVOPACK.
Correct the parameter
–
setting.
• If you are using an
incremental linear
encoder, input the
/S-ON signal from the
host controller.
–
• If you are using an
absolute linear
encoder, execute
polarity detection.
Wire the Servomotor
–
correctly.
Wire the Serial Con-
–
verter Unit correctly.
Wire the cable cor-
–
rectly.
Correct the setting of
–
Pn282.
Change the setting of
Pn080 = n.X
(Motor Phase Selec-
–
tion). Place the linear
encoder and motor in
the same direction.
Correct the settings for
the polarity detection-
–
related parameters.
Tighten any loose ter-
minals or connectors
–
and correct the wiring.
Continued on next page.
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