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12-23
12 Troubleshooting and Maintenance
G5 Series AC Servo Drives With Built-in EtherCAT Communications, Linear Motor Type
1
2
-4 T
ro
u
b
lesh
oo
ting
12
12-4-2
T
rou
b
leshoo
ting U
s
ing the Oper
ation State
The servo locks but the
motor does not operate.
The host controller does not
give a command.
For a position command, check
to see if the speed and position
are set to 0.
Enter position and speed data.
Start the motor.
The Servo Drive received a
command but it is not
accepted.
Check to see if the Servo Drive
retains the object value for two
communications cycles or more
in Profile position mode (pp).
Set the Servo Drive so that it
retains the object value for two
communications cycles or
more.
It is hard to determine if the
motor is rotating
Check to see it the speed
command given by the host
controller is too small.
Check the speed command
from the host controller.
The brake is operating.
Check the brake interlock
output (BKIR) signal and the
+24 VDC power supply.
Check to see if the brake is
released.
The force limits set in the
Positive torque limit value
(60E0 hex) and the
Negative torque limit value
(60E1 hex) are too small.
Check to see if the force limits
in objects 60E0 hex and
60E1 hex are set to a value
close to 0.
Set the maximum force to be
used for each of these objects.
The Positive or Negative
Drive Prohibition Input
(POT or NOT) is OFF.
Check the ON/OFF state of the
POT and NOT signals from the
CX-Drive.
•
Turn ON the POT and NOT
signals.
•
Disable them in the settings
when the POT and NOT
signals are not used.
The control mode does not
conform to the command.
Check the set value of the
Control Mode Selection
(3001 hex).
Set the control mode according
to the command.
The motor power cable is
wired incorrectly.
Check the wiring.
Wire correctly.
The external encoder cable
is wired incorrectly.
Power is not supplied.
Check the power supply and
the 7-segment display.
Turn ON the power.
Check the voltage between the
power terminals.
Wire the power-ON circuit
correctly.
The Servo Drive has broken
down.
Replace the Servo Drive.
The motor operates
momentarily, but then it
does not operate after
that.
The position commands
given are too little.
Check the position data and the
electronic gear ratio at the host
controller.
Set the correct data.
The motor power cable is
wired incorrectly.
Check the wiring of the motor
power cable's phases U, V, and
W.
Wire correctly.
The external encoder cable
is wired incorrectly.
Check the external encoder
cable's wiring.
Wire correctly.
The motor operates
without a command.
There are inputs of small
values in speed control
mode.
Check if there is an input in
speed control mode.
Set the speed command to
“
0.
”
Alternatively, change the mode
to position control mode.
The Servo Drive has broken
down.
Replace the Servo Drive.
Symptom
Probable cause
Items to check
Measures