Troubleshooting Based On The Operation And Conditions Of The Servomotor - YASKAWA SGD7S-1R9D Product Manual

15.4

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
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
Servomotor
with the setting of Pn002
Does Not
(2002 hex) = n.X
Start
(Encoder Usage).
There is a mistake in the
input signal allocations
(Pn50A (250A hex), Pn50B
(250B hex), Pn511 (2511
hex), and Pn516 (2516 hex)).
The Servo ON command
(Enable Operation com-
mand) was not sent.
The torque limit reference is
too small.
The operation mode is not
set.
A software limit is active.
EtherCAT communications
are not established.
The P-OT (Forward Drive
Prohibit) or N-OT (Reverse
Drive Prohibit) signal is still
OFF.

15.4 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.
Turn OFF the Servo Sys-
tem. Check the wiring
condition of the I/O signal
connector (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 (2002 hex) =
n.X.
Check the input signal
allocations (Pn50A (250A
hex), Pn50B (250B hex),
Pn511 (2511 hex), Pn516
(2516 hex)).
Make sure the Servo ON
command (Enable Opera-
tion command) is set to
Operation Enabled.
Check the torque limit ref-
erence.
Check to see if modes of
operation (6060 hex) is
set.
Check to see if the target
position exceeds a soft-
ware limit.
Check to see if the Ether-
CAT indicator shows the
Operational state.
Check the P-OT and N-
OT signals.
Confirmation Correction
Turn OFF the Servo
System. Correct the
wiring so that the con-
trol power supply is
turned ON.
Turn OFF 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 Servo
System. Wire the cable
correctly.
Turn OFF the Servo
System. Reduce the
load or replace the Ser-
vomotor with a Servo-
motor with a larger
capacity.
Set Pn002 (2002 hex) =
n.X according to
the type of the encoder
that is being used.
Correctly allocate the
input signals (Pn50A
(250A hex), Pn50B
(250B hex), Pn511
(2511 hex), Pn516
(2516 hex)).
Set the correct value
for the Servo ON com-
mand (Enable Opera-
tion command).
Increase the torque
limit reference.
Set modes of operation
(6060 hex) correctly.
Specify a target posi-
tion that is within the
software limits.
Place the EtherCAT
communications in the
Operational state.
Turn ON the P-OT and
N-OT signals.
Reference
–
–
page 4-28,
page 9-5
–
–
page 6-31
page 6-4,
page 9-5
−
−
−
−
−
page 9-5
Continued on next page.
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