YASKAWA SGD7S series Product Manual page 157

Alarm Number:
Possible Cause
Alarm Name
A failure occurred in
the Safety Option
A.E74:
Module.
Unsupported
Safety Option
An unsupported
Module
Safety Option Module
was connected.
The delay between
activation of the
/HWBB1 and
A.Eb1:
/HWBB2 input sig-
Safety Function
nals for the HWBB
Signal Input Tim-
was ten second or
ing Error
longer.
A failure occurred in
the SERVOPACK.
A.EC8:
Gate Drive Error 1
(An error
occurred in the
gate drive circuit.) A failure occurred in
the SERVOPACK.
A.EC9:
Gate Drive Error 2
(An error
occurred in the
gate drive circuit.)
A timeout error
A.Ed1:
occurred for a
Command Exe-
MECHATROLINK
cution Timeout
command.
4.2 SERVOPACKs with MECHATROLINK-III Communications References
Confirmation
–
Refer to the catalog of
the connected Safety
Option Module.
Measure the time delay
between the /HWBB1
and /HWBB2 signals.
–
–
Check the motor status
when the command is
executed.
• 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.
4.2.3 Troubleshooting Alarms
Continued from previous page.
Correction
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 on next page.
Reference
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4
4-89