5-16
5-9 Overrun Limit
5
Operating Functions
5-9 Overrun Limit
The overrun limit function is enabled only in Position Control Mode.
The overrun limit is used to stop operation via an alarm if the Servomotor's allowable operating
range set in Overrun Limit Setting (Pn26) is exceeded.
The overrun limit is effective in the following case:
Preventing impact on the edges of the machine because of Servomotor oscillation.
Parameters Requiring Settings
Operation
Servomotor Stopped (Servo Locked)
Since the Servomotor is stopped, the Servomotor’s allowable operating range is within the travel
distance set in the Overrun Limit Setting (Pn26) for both sides of the Servomotor stop position. If
the load of the Servomotor enters the shaded area due to oscillation, an alarm will occur.
In Operation (Traveling)
When a position command is input, the Servomotor’s allowable operating range will increase
according to the position command. In the following figure, an alarm will occur if the load enters the
setting range on the left side before travel and the setting range on the right side after travel due to
oscillation or for other reason.
Parameter
No.
Parameter name Explanation Reference
Pn26
Overrun Limit
Setting
Set the operating range for the Servomotor. The overrun
limit is disabled if the setting is 0.
Page 5-41
Pn26
Range of Err43
Range of Err43
Pn26
Servo-
motor
Servomotor's
allowable
operating range
Load
Pn26 Pn26
Range of Err43
Range of Err43
Servo-
motor
Servomotor's allowable
operating range
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