YASKAWA SGD7S-****20A Series - Page 459

12.2 Alarm Displays
12.2.2 Troubleshooting Alarms
12-40
A.E74:
Unsupported
Safety Option
Module
A failure occurred in
the Safety Option
Module.
–
Replace the Safety Option
Module.
–
An unsupported
Safety Option Module
was connected.
Refer to the catalog of
the connected Safety
Option Module.
Connect a compatible
Safety Option Module.
–
A.Eb1:
Safety Function
Signal Input Tim-
ing Error
The delay between
activation of the
/HWBB1 and
/HWBB2 input sig-
nals for the HWBB
was ten second or
longer.
Measure the time delay
between the /HWBB1
and /HWBB2 signals.
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.
–
A failure occurred in
the SERVOPACK.
–
Replace the SERVO-
PACK.
–
A.EC8:
Gate Drive Error 1
(An error
occurred in the
gate drive circuit.)
A failure occurred in
the SERVOPACK.
–
Turn the power supply to
the SERVOPACK OFF and
ON again. If an alarm still
occurs, the SERVOPACK
may be faulty. Replace the
SERVOPACK.
–
A.EC9:
Gate Drive Error 2
(An error
occurred in the
gate drive circuit.)
A.Ed1:
Command Exe-
cution Timeout
A timeout error
occurred for a
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
operating.
–
• For fully-closed loop
control, check the
status of the external
encoder when the
command is exe-
cuted.
• For other types of
control, check the
status of the linear
encoder when the
command is exe-
cuted.
Execute the SENS_ON
command only when an
external encoder (e.g., a
linear encoder) is con-
nected.
–
Continued on next page.
Continued from previous page.
Alarm Number:
Alarm Name
Possible Cause Confirmation Correction Reference