YASKAWA SGD7S-****20A Series Product Manual page 459

12.2 Alarm Displays
12.2.2 Troubleshooting Alarms
Alarm Number:
Alarm Name
A.E74:
Unsupported
Safety Option
Module
A.Eb1:
Safety Function
Signal Input Tim-
ing Error
A.EC8:
Gate Drive Error 1
(An error
occurred in the
gate drive circuit.) A failure occurred in
A.EC9:
Gate Drive Error 2
(An error
occurred in the
gate drive circuit.)
A.Ed1:
Command Exe-
cution Timeout
12-40
Possible Cause
A failure occurred in
the Safety Option –
Module.
An unsupported Refer to the catalog of
Safety Option Module the connected Safety
was connected. Option Module.
The delay between
activation of the
/HWBB1 and Measure the time delay
/HWBB2 input sig- between the /HWBB1
nals for the HWBB and /HWBB2 signals.
was ten second or
longer.
A failure occurred in
–
the SERVOPACK.
–
the SERVOPACK.
Check the motor status
when the command is
executed.
• For fully-closed loop
control, check the
status of the external
A timeout error
encoder when the
occurred for a
command is exe-
MECHATROLINK
cuted.
command.
• For other types of
control, check the
status of the linear
encoder when the
command is exe-
cuted.
Confirmation
Replace the Safety Option
Module.
Connect a compatible
Safety Option Module.
The output signal circuits
or devices for /HWBB1
and /HWBB2 or the SER-
VOPACK input signal cir-
cuits may be faulty.
Alternatively, the input sig-
nal cables may be discon-
nected. Check to see if
any of these items are
faulty or have been dis-
connected.
Replace the SERVO-
PACK.
Turn the power supply to
the SERVOPACK OFF and
ON again. If an alarm still
occurs, the SERVOPACK
may be faulty. Replace the
SERVOPACK.
Execute the SV_ON or
SENS_ON command only
when the motor is not
operating.
Execute the SENS_ON
command only when an
external encoder (e.g., a
linear encoder) is con-
nected.
Continued from previous page.
Correction Reference
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Continued on next page.