Warning
Code
Warning Name Possible Cause
Confirmation
Correction
Reference
A.9A0
(19A0h)
Overtravel
(Overtravel
status was
detected.)
Overtravel was
detected while the
servo was ON.
Check the status of
the overtravel signals
on the input signal
monitor.
Even if an overtravel
signal is not shown
by the input signal
monitor, momentary
overtravel may have
been detected. Take
the following precau-
tions.
n
Do not specify
movements that
would cause
overtravel from
the host con-
troller.
n
Check the wiring
of the overtravel
signals.
n
Implement coun-
termeasures
against noise.
A.9b0
(19b0h)
Preventative
Maintenance
Warning
One of the consum-
able parts has
reached the end of its
service life.
–
Replace the part.
Contact your YAS-
KAWA representa-
tive for replacement.
16.6 Troubleshooting Based on the Operation and Conditions of the Servomotor
This section provides troubleshooting based on the operation and conditions of the Ser-
vomotor, including causes and corrections.
Problem
Possible Cause
Confirmation
Correction
Reference
Servomotor Does Not
Start
The control power
supply is not turned
ON.
Measure the voltage
between control
power supply termi-
nals.
Turn OFF the power
supply to the servo
system. Correct the
wiring so that the con-
trol power supply is
turned ON.
–
The main circuit
power supply is not
turned ON.
Measure the voltage
across the main circuit
power input terminals.
Turn OFF the power
supply to the servo
system. Correct the
wiring so that the main
circuit power supply is
turned ON.
–
The I/O signal con-
nector (CN1) pins are
not wired correctly or
are disconnected.
Turn OFF the power
supply to the servo
system. Check the
wiring condition of the
I/O signal connector
(CN1) pins.
Correct the wiring of
the I/O signal con-
nector (CN1) pins.
Sigma-7 Series SERVOPACKs
Maintenance
Troubleshooting Based on the Operation and Conditions of the Servomotor
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