Yaskawa SGDH Linear Sigma Series User Manual
Page 364
11 Inspection, Maintenance, and Troubleshooting
11.1.5 Troubleshooting of Alarm and Warning
11-12
A.82
Encoder
Checksum Error
(Detected on the
encoder side.)
Occurred when the
control power sup-
ply was turned ON
or during an opera-
tion.
A fault occurred in the serial converter unit and was
detected by the serial converter unit self-diagnosis.
If this alarm occurs frequently, replace the serial
converter unit.
A SERVOPACK fault occurred.
Replace the SERVOPACK.
A.84
Encoder Data
Error
(Detected on the
encoder side.)
Occurred when the
control power sup-
ply was turned ON.
The linear scale’s signal is weak.
Check if the linear scale is correctly mounted.
A malfunction occurred in the serial converter unit.
Turn the control power supply OFF and then ON
again. If this alarm occurs frequently, replace the
serial converter unit.
A SERVOPACK board fault occurred.
Replace the SERVOPACK.
Occurred during
normal operation.
The linear scale’s signal is weak.
Check if the linear scale is correctly mounted.
A malfunction occurred in the serial converter unit
due to external noise.
Correct the wiring around the serial converter unit
by separating the serial converter unit cable from
the power line, or by checking the grounding and
other wiring.)
A serial converter unit fault occurred.
If this alarm occurs frequently, replace the serial
converter unit.
A SERVOPACK board fault occurred.
Replace the SERVOPACK.
A.b1
Reference
Speed Input
Read Error
(Detected when
the Servo is ON.)
Occurred when the
control power sup-
ply was turned ON.
A SERVOPACK board fault occurred.
Replace the SERVOPACK.
Occurred during
normal operation.
A malfunction occurred in reading section of the
speed reference input.
Clear and reset the alarm and restart the operation.
A SERVOPACK board fault occurred.
Replace the SERVOPACK.
A.b2
Reference
Force Input
Read Error
(Detected when
the servo is ON.)
Occurred when the
control power sup-
ply was turned ON.
A SERVOPACK board fault occurred.
Replace the SERVOPACK.
A malfunction occurred in the reading section of the
force reference input.
Clear and reset the alarm and restart the operation.
Occurred during
normal operation.
A SERVOPACK board fault occurred.
Replace the SERVOPACK.
A.b3
Current
Detection Error
(For the software
version 32 or
later)
Occurred during
normal operation.
Current sensor error is detected or servomotor line is
disconnected.
Check and correct the servomotor power line, or
replace the SERVOPACK.
A.bF
System Alarm
(Program error)
• Software
operation time
exceeded
• Stack overflow
• Micro program
error
Occurred when the
control power sup-
ply was turned ON.
A SERVOPACK board fault occurred.
Replace the SERVOPACK.
Occurred during
normal operation.
A program is incorrect.
Replace the SERVOPACK. (Contact your
Yaskawa representative.)
A SERVOPACK board fault occurred.
Replace the SERVOPACK.
A.C1
Servo Overrun
Detected
Occurred when the
control power sup-
ply was turned ON.
A SERVOPACK board fault occurred.
Replace the SERVOPACK.
Occurred when the
servo was ON or a
reference was input.
The order of phase U, V, and W in the servomotor
wiring is incorrect.
Correct the servomotor wiring.
The polarity detection is not performed properly
(When Pn080.0 = 1 is set).
Correct the settings for the polarity detection
related parameter.
A serial converter unit fault occurred.
Replace the serial converter unit.
A SERVOPACK fault occurred.
Replace the SERVOPACK.
Table 11.5 Alarm Display and Troubleshooting (Cont’d)
Alarm
Display
Alarm Name
Situation at Alarm
Occurrence
Cause
Corrective Actions