YASKAWA SIGMA-7 Series User Manual

6.1 Alarm Displays
6.1.2 Troubleshooting Alarms
6-26
A.C51:
Overtravel
Detected during
Polarity Detection
The overtravel signal
was detected during
polarity detection.
Check the overtravel
position.
Wire the overtravel sig-
nals. Execute polarity
detection at a position
where an overtravel sig-
nal would not be
detected.
*1
A.C52:
Polarity Detec-
tion Not Com-
pleted
The servo was turned
ON when using an
absolute linear
encoder, Pn587 was
set to n.0 (Do
not detect polarity),
and the polarity had
not been detected.
–
When using an absolute
linear encoder, set Pn587
to n.1 (Detect polar-
ity).
–
A.C53:
Out of Range of
Motion for Polar-
ity Detection
The travel distance
exceeded the setting
of Pn48E (Polarity
Detection Range) in
the middle of detec-
tion.
–
Increase the setting of
Pn48E (Polarity Detection
Range). Or, increase the
setting of Pn481 (Polarity
Detection Speed Loop
Gain).
–
A.C54:
Polarity Detec-
tion Failure 2
An external force was
applied to the Servo-
motor.
–
Increase the setting of
Pn495 (Polarity Detection
Confirmation Force Refer-
ence). Increase the setting
of Pn498 (Polarity Detec-
tion Allowable Error
Range). Increasing the
allowable error will also
increase the motor tem-
perature.
–
A.C80:
Encoder Clear
Error or Multiturn
Limit Setting Error
A failure occurred in
the encoder.
–
Turn the power supply to
the SERVOPACK OFF and
ON again. If the alarm still
occurs, the Servomotor or
linear encoder may be
faulty. Replace the Servo-
motor or linear encoder.
–
A failure occurred in
the SERVOPACK.
–
Turn the power supply to
the SERVOPACK OFF and
ON again. If the alarm still
occurs, the SERVOPACK
may be faulty. Replace the
SERVOPACK.
–
Continued on next page.
Continued from previous page.
Alarm Number:
Alarm Name
Possible Cause Confirmation Correction Reference

YASKAWA SIGMA-7 Series Specifications

General

Encoder Resolution	24-bit absolute encoder
Pollution Degree	2
Cooling Method	Natural cooling or forced air cooling
Control Method	Vector control
Communication Protocols	EtherCAT, MECHATROLINK-III
Input Voltage	AC 200 V, AC 400 V
Rated Output	Varies by model
Safety Function	STO (Safe Torque Off), SS1 (Safe Stop 1), SS2 (Safe Stop 2), SLS (Safely Limited Speed), SBC (Safe Brake Control)
Power Supply Voltage	AC 200 V, AC 400 V
Rated Output Current	Varies by model
Protection Functions	Overload, overvoltage, undervoltage, overheat, short circuit
Operating Temperature	0°C to 55°C
Storage Temperature	-20°C to 65°C
Vibration Resistance	5.9 m/s² at 10 Hz to 55 Hz
Ambient Humidity	5% to 95% RH (non-condensing)
Altitude	Up to 1000 m
Installation	Panel mounted