6.13 Motor Overload Detection Level
6.13.1 Detection Timing for Overload Warnings (A.910)
6-40
6.13
Motor Overload Detection Level
The motor overload detection level is the threshold used to detect overload alarms and over-
load warnings when the Servomotor is subjected to a continuous load that exceeds the Servo-
motor ratings.
It is designed to prevent Servomotor overheating.
You can change the detection timing for A.910 warnings (Overload) and A.720 alarms (Contin-
uous Overload). You cannot change the detection level for A.710 alarms (Instantaneous Over-
load).
6.13.1
Detection Timing for Overload Warnings (A.910)
With the default setting for overload warnings, an overload warning is detected in 20% of the
time required to detect an overload alarm. You can change the time required to detect an over-
load warning by changing the setting of the overload warning level (Pn52B). You can increase
safety by using overload warning detection as an overload protection function matched to the
system.
The following graph shows an example of the detection of overload warnings when the over-
load warning level (Pn52B) is changed from 20% to 50%. An overload warning is detected in
half of the time required to detect an overload alarm.
Pn52B
(252Bh)
Overload Warning Level
Setting Range
Setting Unit
Default Setting
When Enabled
Classification
1 to 100
1%
20
Immediately
Setup
Overload
detection time
Detection curve for
overload warnings
when Pn52B = 50%
Detection curve for overload alarms
Detection curve for overload warnings
when Pn52B = 20% (default setting)
Torque reference (%)
200%
100%
Speed
Position
Torque
