YASKAWA SIGMA-7 Series User Manual

6.1 Alarm Displays
6.1.2 Troubleshooting Alarms
6-12
A.101:
Motor Overcur-
rent Detected
(The current to
the motor
exceeded the
allowable cur-
rent.)
The Main Circuit
Cable is not wired
correctly or there is
faulty contact.
Check the wiring. Correct the wiring.
*1
There is a short-circuit
or ground fault in a
Main Circuit Cable.
Check for short-circuits
across cable phases U,
V, and W, or between
the ground and cable
phases U, V, and W.
The cable may be short-
circuited. Replace the
cable.
There is a short-circuit
or ground fault inside
the Servomotor.
Check for short-circuits
across Servomotor
phases U, V, and W, or
between the ground
and Servomotor phases
U, V, or W.
The Servomotor may be
faulty. Replace the Servo-
motor.
There is a short-circuit
or ground fault inside
the SERVOPACK.
Check for short-circuits
across the Servomotor
connection terminals U,
V, a n d W o n t h e
SERVOPACK, or
between the ground
and terminals U, V, or
W.
The SERVOPACK may be
faulty. Replace the
SERVOPACK.
A heavy load was
applied while the Ser-
vomotor was stopped
or running at a low
speed.
Check to see if the
operating conditions
exceed Servo Drive
specifications.
Reduce the load applied
to the Servomotor. Or,
increase the operating
speed.
–
A malfunction was
caused by noise.
Improve the noise envi-
ronment, e.g. by
improving the wiring or
installation conditions,
and check to see if the
alarm still occurs.
Implement countermea-
sures against noise, such
as correct wiring of the
FG. Use an FG wire size
equivalent to the SERVO-
PACK’s main circuit wire
size.
–
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.
–
A.300:
Regeneration
Error
When using the built-
in regenerative resis-
tor, the jumper
between the regener-
ative resistor terminals
(B2 and B3) was
removed.
Check to see if the
jumper is connected
between power supply
terminals B2 and B3.
*4
Correctly connect a
jumper.
*1
The External Regener-
ative Resistor is not
wired correctly, or was
removed or discon-
nected.
Check the wiring of the
External Regenerative
Resistor.
*4
Correct the wiring of the
External Regenerative
Resistor.
A failure occurred in
the SERVOPACK.
–
While the main circuit
power supply is OFF, turn
the control power supply
to the SERVOPACK OFF
and ON again. If the alarm
still occurs, the SERVO-
PACK may be faulty.
Replace the SERVO-
PACK.
–
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