YASKAWA SGM7D-30F Product Manual page 112

Problem Possible Cause
Speed control: The speed
reference input is not appro-
priate.
Torque control: The torque
Servomotor
reference input is not appro-
Moves with-
priate.
out a Refer-
ence Input
The speed reference offset is
not correct.
Position control: The refer-
ence pulse input is not
appropriate.
A failure occurred in the SER-
VOPACK.
The setting of Pn001 =
n.X (Servo OFF or
Alarm Group 1 Stopping
Method) is not suitable.
Dynamic
The dynamic brake resistor is
Brake Does disconnected.
Not Operate
There was a failure in the
dynamic brake drive circuit.
3.1 FT82 SERVOPACKs with Analog Voltage/Pulse Train References
3.1.7 Troubleshooting Based on the Operation and Conditions of the Servomotor
Confirmation
Check between the
speed reference input (V-
REF) and signal ground
(SG) to see if the control
method and the input
agree.
Check between the
torque reference input (T-
REF) and signal ground
(SG) to see if the control
method and the input
agree.
The SERVOPACK offset
is adjusted incorrectly.
Check the setting of
Pn200 =n.X (Refer-
ence Pulse Form) and the
sign and pulse signals.
–
Check the setting of
Pn001 = n.X.
Check the moment of
inertia, motor speed, and
dynamic brake frequency
of use. If the moment of
inertia, motor speed, or
dynamic brake frequency
of use is excessive, the
dynamic brake resis-
tance may be discon-
nected.
–
Continued from previous page.
Correction Reference
Correctly set the con-
*
trol method and input
method.
Correctly set the con-
*
trol method and input
method.
Adjust the SERVO-
*
PACK offset.
Correctly set the con-
trol method and input
–
method.
Replace the SERVO-
–
PACK.
Set Pn001 = n.X
–
correctly.
Replace the SERVO-
PACK. To prevent dis-
–
connection, reduce the
load.
There is a defective
component in the
dynamic brake circuit.
–
Replace the SERVO-
PACK.
Continued on next page.
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