YASKAWA SGD7S-xxxDA0 series Product Manual page 562

16.4 Troubleshooting Based on the Operation and Conditions of the Servomotor
Problem
Servomotor
Does Not
Start
Servomotor
Moves
Instanta-
neously,
and Then
Stops
16-56
Possible Cause
The safety input signals
(/HWBB1 or /HWBB2) were
not turned ON.
The FSTP (Forced Stop
Input) signal is still OFF.
A failure occurred in the SER-
VOPACK.
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-
ear encoder wiring.
The setting of Pn282 (2282h)
(Linear Encoder Pitch) is not
correct.
The count-up direction of the
linear encoder does not
match the forward direction
of the Moving Coil in the
motor.
Polarity detection was not
performed correctly.
Confirmation
Check the /HWBB1 and
/HWBB2 input signals.
Check the FSTP signal.
–
Check the setting of
Pn080 (2080h) =
n.X (Polarity Sen-
sor Selection).
Check the inputs to the
Servo ON command
(Enable Operation com-
mand).
Turn OFF the Servo Sys-
tem. Check the wiring.
Turn OFF the Servo Sys-
tem. Check the wiring.
Turn OFF the Servo Sys-
tem. Check the wiring.
Check the setting of
Pn282 (2282h).
Check the directions.
Check to see if electrical
angle 2 (electrical angle
from polarity origin) at any
position is between ±10°.
Continued from previous page.
Correction Reference
Turn ON the /HWBB1
and /HWBB2 input sig-
nals. If you are not
using the safety func-
page 10-5
tion, connect the Safety
Jumper Connector
(provided as an acces-
sory) to CN8.
• Turn ON the FSTP
signal.
• If you will not use the
function to force the
motor to stop, set
page 10-5
Pn516 (2516h) =
n.X (FSTP
(Forced Stop Input)
Signal Allocation) to
disable the signal.
Turn OFF the Servo
−
System. Replace the
SERVOPACK.
Correct the parameter
page 6-22
setting.
• If you are using an
incremental linear
encoder, send the
Servo ON command
(Enable Operation
command) from the
page 6-23
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
page 6-15
Pn282 (2282h).
Change the setting of
Pn080 (2080h) =
n.X (Motor Phase
Selection). Match the
page 6-20
linear encoder direc-
tion and motor direc-
tion.
Correct the settings for
−
the polarity detection-
related parameters.
Continued on next page.