Yaskawa Sigma II Series Servo System - Manual (Page 430)

Sigma II User’s Manual Chapter 9: Inspection, Maintenance, and Troubleshooting
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9.2.4 List of Additional or Modified Alarm and Warning Displays
(Applicable only to SGDH amplifiers with version # 33
or
higher)
Alarms
*1: Indicates whether the alarm can be reset or not after having removed the cause of alarm.
Alarm
Display
Alarm Code
Output
Servo
Alarm
(ALM)
Output
Alarm Name Cause
Alarm
Reset *1
Corrective
Actions
ALO1 ALO2 ALO3
A.09 × × × × Dividing ratio
setting error
The setting of dividing
ratio (Pn212) is not
acceptable (out of fixed
increments), or exceeds
the value for the
connected encoder
resolution.
Not
available
Correct the
setting of Pn212,
and turn OFF the
control power
and turn it ON
again.
When a linear motor is
connected:
A value higher than the
allowable maximum
dividing ration calculated
on the base of the linear
motor maximum speed
was set in Pn281.
Not
available
Check Un010,
and correct the
setting. Turn
OFF the control
power and turn it
ON again to
enable the new
setting.
A.0A × × × × Encoder
model
unmatched
The mounted serial
encoder is not supported
by Σ-II series servo
amplifier.
Not
available
Replace the
servomotor with
Σ-II series servo
amplifier
supported model.
A.55 ○
×
○
× Linear motors
Max. speed
setting error
When a linear motor is
connected
A value higher than the
linear motor maximum
speed is set in Pn384.
Available Reduce the
setting in Pn384
to the linear
motor maximum
speed or less.
A.b3 × ×
×
× Current
detection error
The current sensor is
faulty, or the servomotor is
disconnected.
Available Check the
servomotor
power line wiring
Replace the
servo amplifier.
A.F5
A.F6
× ○ × × Servomotor
disconnection
alarm
The detected toque is
10% or less, but the com-
manded torque reference
is 90% or more for 10ms.
This alarm is not activated
in cases of BB due to
hardware issues. In those
cases, an A.F6 or A.b3 is
generated instead.
Available Check the
servomotor
power line wiring.
Replace the
servo amplifier.