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11. Alarm and Warning
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11.3.17. Over Travel F2: Software Over Travel Limit

The following are two types of setting of the off limits area to the Motor.

Software over travel limit: The parameter sets the position data for the off limits area. .
(Refer to “6.2.4. Software Over Travel Limit” for setting the off limits area.

Hardware over travel limit: Output signal from the limit sensors to the Driver unit sets the off
limits area.

This warning reports that the Motor enters or passes through the off limits area set by the software travel
limits.
Table 11-24: Cause and remedy for the software over travel limit
Cause Remedy
(1)
The Motor enters the off-limits are set by
the parameters OTP and OTM.

Move the Motor out of the off limits area.
(1) F2 alarm is produced when the over travel is occurred.
The software over travel is detected based on the positioning command, rather than the current Motor
position. Positioning command is equal to the sum of current position and position error.
Therefore, if the positioning command is not within the range of software over travel detection, the F2
alarm is not produced even the actual motor position is entered within the detection range due to the
overshooting.

When you need to detect the over limit using current Motor position, the hardware over travel
limit detection is needed.
It is essential to place the external limit sensor.

The hardware over travel limit detection will occur even the Motor servo=off state. The detected
position is actual Motor position.
(2) The software over travel limits OTPA and OTMA outputs the direction from which side the Motor gets in
the limit area.
Table 11-25: Relation between the output OTPA and OTMA
Direction of intrusion on
the area
State of the outputs OTPA
and OTMA
From OTP side Output OTPA opens
From OTM side
Output OTMA opens