Yaskawa Sigma-5 Large Capacity Users Manual: Design and Maintenance-Rotary Motors-Analog Voltage and Pulse Train Reference - Manual (Page 378)

10 Troubleshooting
10.2.1 List of Warnings
10-22
10.2 Warning Displays
The following sections describe troubleshooting in response to warning displays.
The warning name, warning meaning, and warning code output are listed in order of the warning numbers in
10.2.1 List of Warnings.
The causes of warnings and troubleshooting methods are provided in 10.2.2 Troubleshooting of Warnings.
10.2.1 List of Warnings
This section provides list of warnings.
Note 1. Warning code is not output without setting Pn001.3 =1 (outputs both alarm codes and warning codes).
2. If Pn008.2 = 1 (does not detect warning) is selected, no warnings will be detected except for an undervoltage
warning (A.971).
Warning
Number
Warning Name Meaning
Warning Code Output
ALO1 ALO2 ALO3
A.900 Position Error Overflow
Position error exceeded the parameter setting
(Pn520 ×Pn51E/100).
H H H
A.901
Position Error Overflow
Alarm at Servo ON
When the servomotor power is ON, the position
error exceeded the parameter setting
(Pn526
×Pn528/100).
H H H
A.910 Overload
This warning occurs before the overload alarms
(A.710 or A.720) occur. If the warning is ignored
and operation continues, an overload alarm may
occur.
L H H
A.911 Vibration
Abnormal vibration at the motor speed was
detected. The detection level is the same as
A.520. Set whether to output an alarm or warning
by the vibration detection switch (Pn310).
L H H
A.920 Regenerative Overload
This warning occurs before the regenerative over-
load alarm (A.320) occurs. If the warning is
ignored and operation continues, a regenerative
overload alarm may occur.
H L H
A.921 Dynamic Brake Overload
This warning occurs before dynamic brake over-
load alarm (A.731) occurs. If the warning is
ignored and operation continues, a dynamic brake
overload alarm may occur.
H L H
A.930
Absolute Encoder Battery
Error
This warning occurs when the voltage of absolute
encoder’s battery is lowered.
L L H
A.941
Change of Parameters Re-
quires Restart
Parameters that require the restart have been
changed.
H H L
A.971 Undervoltage
This warning occurs before undervoltage alarm
(A.410) occurs. If the warning is ignored and
operation continues, an undervoltage alarm may
occur.
L L L
A.9A0 Overtravel
Overtravel is detected while the servomotor
power is ON.
H L L