YASKAWA SGM7D-30F Product Manual page 318

3.5.9 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.
Turn OFF the Servo System before troubleshooting the items shown in bold lines in the table.
Problem
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-
Servomotor
rect.
Does Not
The /S-ON (Servo ON) signal
Start
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.
The safety input signals
(/HWBB1 or /HWBB2) were
not turned ON.
A failure occurred in the SER-
VOPACK.
3.5 FT83 SERVOPACKs with Analog Voltage/Pulse Train References
3.5.9 Troubleshooting Based on the Operation and Conditions of the Servomotor
Possible Cause
Measure the voltage
between control power
supply terminals.
Measure the voltage
across the main circuit
power input terminals.
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.
Check the /HWBB1 and
/HWBB2 input signals.
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Confirmation Correction
Correct the wiring so
that the control power
supply is turned ON.
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.
Wire the cable cor-
rectly.
Reduce the load or
replace the Servomo-
tor with a Servomotor
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 and
N-OT signals.
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.
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.
Replace the SERVO-
PACK.
Reference
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Continued on next page.
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