YASKAWA SIGMA-7 Series User Manual

6.1 Alarm Displays
6.1.2 Troubleshooting Alarms
6
Maintenance
6-11
A.100:
Overcurrent
Detected
(An overcurrent
flowed through
the power tran-
sistor or the heat
sink overheated.)
The regenerative pro-
cessing capacity was
exceeded.
Check the regenerative
load ratio in the Sig-
maWin+ Motion Monitor
Tab Pa g e t o s ee how
frequently the regenera-
tive resistor is being
used.
Recheck the operating
conditions and load.
*4
The SERVOPACK
regenerative resis-
tance is too small.
Check the regenerative
load ratio in the Sig-
maWin+ Motion Monitor
Tab Pa g e t o s ee how
frequently the regenera-
tive resistor is being
used.
Change the regenerative
resistance to a value
larger than the SERVO-
PACK minimum allowable
resistance.
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.
–
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