— 9-4 —
9.1.4. Overtravel Limit
9.1.4.1. Hardware Overtravel Limit
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Hardware overtravel limit is effective when I/O type is set to TY3, TY4 or TY7.
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Use the OTP and OTM inputs to restrict the range of Motor movement.
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If the OTP input is activated, the Motor motion will stop immediately and remain in servo-on.
The Motor can be moved to the minus direction only.
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If the OTM input is activated, the Motor motion will stop immediately and remain in servo-on.
The Motor can be moved to the plus direction only.
* The polarity of the OTP and OTM input ports is set to A contact before shipment. It can be
changed to B contact (refer to the section on the AB parameter).
* Besides the OTP and OTM inputs, the Motor rotation can also be limited by software (software
overtravel limit function) in the Driver Unit. Refer to “9.1.4.2. Software Overtravel Limit”.
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When the overtravel error occurs, the DRDY output will be open and displays the
following on the front panel.
OTP or OTM limit
: F3
Software overtravel limit : F2
Figure 9-5
10ms max.
Close
Open
ON
OFF
OTP input
OTM input
DRDY output
* When the OTP or OTM input works in the middle of the home return operation, the Motor
completes the home return operation after performing the following :
(1) When the Motor is moving to the minus direction
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Caution : • The OTP input is invalid (the Motor continues to move).
• Turning on the OTM input makes the Motor decelerate, then move in
reverse.
(2) When the Motor is moving to the plus direction
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Caution : • The OTM input is invalid (the Motor continues to move).
• Turning on the OTP input makes the Motor decelerate, then move in
reverse.
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