9.1 Alarm Displays
9-21
9
T
roub
lesho
oti
ng
A.E74:
Unsupported Safety
Option Module
A safety option module fault
occurred.
−
Replace the safety option module.
A unsupported safety option
module was connected.
Refer to the catalog of the con-
nected safety option module.
Connect a compatible safety option
module.
A.E75:
Unsupported
Feedback Option
Module
A feedback option module fault
occurred.
−
Replace the feedback option mod-
ule.
A unsupported feedback option
module was connected.
Refer to the catalog of the con-
nected feedback option module or
the manual of the SERVOPACK.
Connect a compatible feedback
option module.
A.EA2:
DRV Alarm 2
(SERVOPACK WDT
error)
MECHATROLINK transmission
cycle fluctuated.
Check the MECHATROLINK
transmission cycle setting.
Remove the cause of transmission
cycle fluctuation at host controller.
A SERVOPACK fault occurred.
−
Turn the power supply to the SER-
VOPACK OFF and ON again. If the
alarm still occurs, the SERVO-
PACK may be faulty. Replace the
SERVOPACK.
A.Eb1:
Safety Function Signal
Input Timing Error
The lag between activations of
the input signals /HWBB1 and
/HWBB2 for the HWBB function
is ten second or more.
Measure the time lag between the /
HWBB1 and
/HWBB2 signals.
The output signal circuits or devices
for /HWBB1 and
/HWBB2 or the SERVOPACK
input signal circuits may be faulty.
Alternatively, the input signal
cables may be disconnected. Check
if any of these items are faulty or
have been disconnected.
A.Ed1:
Command Execution
Timeout
A timeout error occurred when
using an MECHATROLINK
command.
Check the motor status when the
command is executed.
Execute the SV_ON or SENS_ON
command only when the motor is
not running.
For fully-closed loop control, check
the status of the external encoder
after an output is made to execute
the command.
Execute the SENS_ON command
only when an external encoder is
connected.
A.F10:
Main Circuit Cable
Open Phase
(A low voltage contin-
ued for one second or
longer in either phase R,
S, or T when the main
circuit power supply was
ON.)
(Detected when the main
circuit power supply is
turned ON.)
The three-phase power supply
wiring is incorrect.
Check the power supply wiring.
Confirm that the power supply is
correctly wired.
The three-phase power supply is
unbalanced.
Measure the voltage at each phase
of the three-phase power supply.
Balance the power supply by chang-
ing phases.
A single-phase power is input
without setting Pn00B.2 (power
supply method for three-phase
SERVOPACK) to 1 (single-phase
power supply).
Check the power supply and the
parameter setting.
Match the parameter setting to the
power supply.
A SERVOPACK fault occurred.
−
Turn the power supply to the SER-
VOPACK OFF and ON again. If the
alarm still occurs, the SERVO-
PACK may be faulty. Replace the
SERVOPACK.
A.F50:
Servomotor Main
Circuit Cable
Disconnection
(The servomotor did not
operate or power was not
supplied to the
servomotor even though
the SV_ON (Servo ON)
command was input
when the servomotor
was ready to receive it.)
A SERVOPACK fault occurred.
−
The SERVOPACK may be faulty.
Replace the SERVOPACK.
The wiring is not correct or there
is a faulty contact in the motor
wiring.
Check the wiring.
Make sure that the servomotor is
correctly wired.
(cont’d)
Alarm Number:
Alarm Name
Cause
Investigative Actions
Corrective Actions