YASKAWA Sigma-7 SGD7S Series - Page 648

Problem Possible Cause Confirmation Correction Reference
The safety input sig-
nals (/HWBB1 or /
HWBB2) were not
turned ON.
Check the /HWBB1
and /HWBB2 input
signals.
Turn ON the /HWBB1
and /HWBB2 input
signals. If you are not
using the safety func-
tion, connect the
Safety Jumper Con-
nector (provided as an
accessory) to CN8.
Ä Chap. 10.3.3 ‘I/O
Signal Monitor’
page 437
The FSTP (Forced
Stop Input) signal is
still OFF.
Check the FSTP
signal.
n Turn ON the FSTP
signal.
n If you will not use
the function to
force the motor to
stop, set Pn516 =
n.X (FSTP
(Forced Stop
Input) Signal Allo-
cation) to disable
the signal.
Ä Chap. 10.3.3 ‘I/O
Signal Monitor’
page 437
A failure occurred in
the SERVOPACK.
– Turn OFF the power
supply to the servo
system. Replace the
SERVOPACK.
–
The polarity detection
was not executed.
Check the setting of
Pn080 = n.X
(Polarity Sensor
Selection).
Correct the parameter
setting.
Ä Chap. 6.9 ‘Polarity
Sensor Setting’
page 156
Check the inputs to
the Servo ON com-
mand (Enable Opera-
tion command).
n If you are using an
incremental linear
encoder, send the
Servo ON com-
mand (Enable
Operation com-
mand) from the
host controller.
n If you are using an
absolute linear
encoder, execute
polarity detection.
Ä Chap. 6.10 ‘Polarity
Detection’ page 157
Servomotor Moves
Instantaneously, and
Then Stops
There is a mistake in
the Servomotor wiring.
Turn OFF the power
supply to the servo
system. Check the
wiring.
Wire the Servomotor
correctly.
−
There is a mistake in
the wiring of the
encoder or Serial
Converter Unit.
Turn OFF the power
supply to the servo
system. Check the
wiring.
Wire the Serial Con-
verter Unit correctly.
−
There is a mistake in
the linear encoder
wiring.
Turn OFF the power
supply to the servo
system. Check the
wiring.
Wire the cable cor-
rectly.
−
The setting of Pn282
(Linear Encoder Pitch)
is not correct.
Check the setting of
Pn282.
Correct the setting of
Pn282.
Ä Chap. 6.6 ‘Setting
the Linear Encoder
Pitch’ page 146
Sigma-7 Series SERVOPACKs
Maintenance
Troubleshooting Based on the Operation and Conditions of the Servomotor
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