10 - 5
10   Troubleshooting and Maintenance
OMNUC G5-series (Pulse-train Input Type) AC Servomotors and Servo Drives User’s Manual
10-2  Warning List
10
10-2 Warning List
The warning function outputs a warning signal and notifies state such as an overload before activation 
of a protective function.
Set what types of warning you want the Servo Drive to output in Warning Output Selection 1 (Pn440) 
and Warning Output Selection 2 (Pn441).
Precautions for Correct UsePrecautions for Correct Use
You will be brought to the state before the occurrence of the warning automatically after recovery 
from the error condition. However, the warning state will be retained during the time period set in 
Warning Latch Hold Time Selection (Pn627). To clear the warning state before the latch hold 
time expires, follow a similar procedure as you do when clearing an alarm.
*1 The “√” fields can be set to 1 to 10 s in Warning Latch Hold Time Selection (Pn627) or to no time limit. 
However, the battery warning is fixed to no time limit.
*2 Select the types of warning to be output from Warning Output 1 (WARN1) and Warning Output 2 (WARN2) in 
Warning Output Selection 1 (Pn440) and Warning Output Selection 2 (Pn441). If you set these parameters to 
0, all warning types will be output. Do not set other values not listed above.
*3 Each warning detection can be masked by Warning Mask Setting (Pn638). The bit corresponding to each 
warning is shown in the table above. 
When the bit is set to 1, the warning detection is masked.
Warning List
Warning 
No.
Warning name
Latch
*1
Warning condition
Warning Output 
Selection
(Pn440, Pn441)
*2
Warning 
Mask Setting
(Pn638)
A0 Overload 
Warning
√ The load ratio is 85% or more 
of the protection level.
1bit 7
A1 Excessive 
Regeneration 
Warning
√ The regeneration load ratio is 
85% or more of the level.
2bit 5
A2 Battery Warning Fixed to no 
time limit
The battery voltage is 3.2 V or 
less.
3bit 0
A3 Fan Warning √ The fan stop state continues for 
1 second.
4bit 6
A4 Encoder 
Communications 
Warning
√ The encoder communications 
errors occurred in series more 
frequently than the specified 
value.
5bit 4
A5 Encoder 
Overheating 
Warning
√ The encoder temperature 
exceeded the specified value.
6bit 3
A6 Vibration 
Detection 
Warning
√ Vibrating is detected. 7 bit 9
A7 Life Expectancy 
Warning
Fixed to no 
time limit
The life expectancy of the 
capacitor or the fan is equal to 
or less than the specified value.
8bit 2