YASKAWA SIGMA-7 Series User Manual

6.1 Alarm Displays
6.1.2 Troubleshooting Alarms
6-20
A.850:
Encoder Over-
speed
(Detected at the
encoder when
the control power
supply is turned
ON.)
Rotary Servomotor:
The Servomotor
speed was 200 min
-1
or higher when the
control power supply
was turned ON.
Check the motor speed
when the power supply
is turned ON.
Reduce the Servomotor
speed to a value less than
200 min
-1
, and turn ON
the control power supply.
–
Linear Servomotor:
The Servomotor
exceeded the speci-
fied speed when the
control power supply
was turned ON.
Check the motor speed
when the power supply
is turned ON.
Control the motor speed
within the range specified
by the linear encoder
manufacturer and then
turn ON the control power
supply.
–
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.
–
A.860:
Encoder Over-
heated
(Detected when a
Rotary Servomo-
tor or Absolute
Linear Encoder is
connected.
(Detected at the
encoder.)
The surrounding air
temperature around
the Servomotor is too
high.
Measure the surround-
ing air temperature
around the Servomotor.
Reduce the surrounding
air temperature of the
Servomotor to 40°C or
less.
–
The Servomotor load
is greater than the
rated load.
Use the accumulated
load ratio to check the
load.
Operate the Servo Drive
so that the motor load
remains within the speci-
fied range.
*1
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
absolute linear encoder
may be faulty. Replace the
Servomotor or absolute
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