YASKAWA Sigma-7-Series Product Manual page 90

5.3 Troubleshooting Alarms
Alarm Number:
Alarm Name
A.044:
Semi-Closed/
Fully-Closed
Loop Control
Parameter
Setting Error
A.04A:
Parameter Set-
ting Error 2
A.050:
Combination
Error
(The capacities of
the SERVOPACK
and Servomotor
do not match.)
A.051:
Unsupported
Device Alarm
A.0b0:
Invalid Servo ON
Command Alarm
5-10
Possible Cause
The setting of the
Fully-Closed Module
does not match the Check the setting of
setting of Pn002 = Pn002 = n.X.
n.X (External
Encoder Usage).
For 4-byte parameter
bank members, there
are two consecutive –
members with nothing
registered.
The total amount of
bank data exceeds 64
–
(Pn900 × Pn901 >
64).
Confirm that the follow-
The SERVOPACK and
ing condition is met:
Servomotor capaci-
1/4 ≤ (Servomotor
ties do not match
capacity/SERVOPACK
each other.
capacity) ≤ 4
Replace the encoder
A failure occurred in
and check to see if the
the encoder.
alarm still occurs.
A failure occurred in
–
the SERVOPACK.
An unsupported Serial
Converter Unit or
Check the product
encoder (e.g., an
combination specifica-
external encoder) is
tions.
connected to the
SERVOPACK.
The SV_ON (Servo
ON) command was
sent from the host
controller after a util- –
ity function that turns
ON the Servomotor
was executed.
Confirmation
Make sure that the setting
of the Fully-closed Mod-
ule agrees with the setting
of Pn002 = n.X.
Change the number of
bytes for bank members
to an appropriate value.
Reduce the total amount
of bank data to 64 or less.
Select a proper combina-
tion of the SERVOPACK
and Servomotor capaci-
ties.
Replace the Servomotor
or encoder.
The SERVOPACK may be
faulty. Replace the SER-
VOPACK.
Change to a correct com-
bination of models.
Turn the power supply to
the SERVOPACK OFF and
ON again. Or, execute a
software reset.
Continued from previous page.
Correction Reference
*1
–
–
*1
–
–
–
*1
Continued on next page.