Troubleshooting Based On The Operation And Conditions Of The Servomotor - YASKAWA SGD7S-R70A Product Manual

8.3 Troubleshooting Based on the Operation and Conditions of the Servomotor

8.3

Troubleshooting Based on the Operation and Conditions of the Servomotor

This section provides troubleshooting based on the operation and conditions of the Servomo-
tor, including causes and corrections.
Problem
Servomotor
Does Not
Start
8-52
Possible Cause
The control power supply is
not turned ON.
The main circuit power sup-
ply is not turned ON.
The I/O signal connector
(CN1) pins are not wired cor-
rectly or are disconnected.
The wiring for the Servomo-
tor Main Circuit Cables or
Encoder Cable is discon-
nected.
There is an overload on the
Servomotor.
The type of encoder that is
being used does not agree
with the setting of Pn002 =
n.X (Encoder Usage).
Settings for input signals
Pn630 to Pn64D are incor-
rect.
The /S-ON (Servo ON) signal
was not received.
The P-OT (Forward Drive
Prohibit) or N-OT (Reverse
Drive Prohibit) signal is still
OFF.
The current position of the
servomotor is outside the
software limit setting range.
There is no position refer-
ence, or it is incorrect.
Confirmation
Measure the voltage
between control power
supply terminals.
Measure the voltage
across the main circuit
power input terminals.
Turn OFF the power sup-
ply to the servo system.
Check the wiring condi-
tion of the I/O signal con-
nector (CN1) pins.
Check the wiring condi-
tions.
Operate the Servomotor
with no load and check
the load status.
Check the type of the
encoder that is being
used and the setting of
Pn002 = n.X.
Check settings of input
signals Pn630 to Pn64D.
Check the commands
sent from the host con-
troller.
Check the P-OT and N-
OT signals.
Check for INDEXER
errors.
Check for INDEXER
errors.
Correction Reference
Turn OFF the power
supply to the servo
system. Correct the
–
wiring so that the con-
trol power supply is
turned ON.
Turn OFF the power
supply to the servo
system. Correct the
–
wiring so that the main
circuit power supply is
turned ON.
Correct the wiring of
the I/O signal connec- –
tor (CN1) pins.
Turn OFF the power
supply to the servo
–
system. Wire the cable
correctly.
Turn OFF the power
supply to the servo
system. Reduce the
load or replace the Ser-
–
vomotor with a Servo-
motor with a larger
capacity.
Set Pn002 = n.X
according to the type of
–
the encoder that is
being used.
Correct the settings of
input signals Pn630 to
–
Pn64D.
Turn ON the /S-ON sig-
nal from the host con-
–
troller.
Turn ON the P-OT or
–
N-OT signal.
Check the motor posi-
tion and software limit
setting (Pn638 and
Pn63A), then move the
–
servomotor into the
software limit setting
range.
Set the program table
–
correctly.
Continued on next page.