8.4 Troubleshooting for Malfunction without Alarm Display
151
8.4
Troubleshooting for Malfunction without Alarm Display
Troubleshooting for malfunctions that cause no alarm display on the host controller and CX-Drive con-
nected to the SERVOPACK through MECHATROLINK-II communications is listed below.
Contact your Omron Yaskawa representative if the problem cannot be solved by the described correc-
tive action.
Note: For shaded sections, Turn OFF the servo system power supply before perform-
ing the inspections and corrective actions.
Malfunction
Cause
Inspection
Corrective Actions
The PWR LED
does not light
up when the
power supply
turns ON.
Incorrect wiring of the power
supply cable
Check if the power supply
input is within the range of
the power supply voltage.
Correct the voltage range of
the power supply.
Check if the wiring of the
power supply input is cor-
rect.
Correct the wiring.
Incorrect wiring of the
regenerative unit
Check if the wiring of the
regenerative unit cable is
correct.
Replace the SERVOPACK
and regenerative unit, and
correct the wiring.
Servomotor
does not rotate.
Incorrect wiring or discon-
nection of I/O signal
Check if the connector is
properly installed and wir-
ing is correct.
Correct the wiring of the con-
nector.
The servomotor and
encoder wirings are discon-
nected.
Check the wiring.
Correct the wiring.
Overloaded
Run the servomotor without
load.
Reduce the load, or replace
the servomotor with a larger
capacity.
Motion command was not
sent.
Check the command sent
from the host controller.
Send a motion command.
Servo ON (SV_ON) com-
mand was not sent.
Check the command sent
from the host controller.
Send a servo ON (SV_ON)
command.
Forward run prohibited (P-
OT) and reverse run prohib-
ited (N-OT) input signals are
OFF.
Check the P-OT or the N-OT
input signal.
Turn ON either the P-OT or
the N-OT input signal.
The power supply is OFF.
Check the PWR LED to see
if the power supply is ON.
Turn the power supply ON.
Check the voltage between
the power supply terminals.
Correct the power supply ON
circuit.
The SERVOPACK is faulty.
The SERVOPACK board is
faulty.
Replace the SERVOPACK.
Servomotor
runs instanta-
neously, and
then stops.
The servomotor wiring is
incorrect.
Check the servomotor wir-
ing.
Correct the servomotor wir-
ing.
The encoder wiring is incor-
rect.
Check the encoder wiring.
Check the encoder wiring.
TOEP_C710806_03A_1_0.book Seite 151 Montag, 2. Juli 2007 3:55 15
