NSK MEGATORQUE M-ESA-Y2005V25 - Over-Travel Limit Switch; Hardware Over-Travel Limit Switch

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9.1.5. Over-travel Limit Switch
9.1.5.1. Hardware Over-travel Limit Switch
l Use the OTP and OTM inputs to restrict the range of Motor rotation.
l If the OTP input is activated, the Motor will stop immediately and remain in servo-on. The Motor
can rotate in counter clockwise only.
l If the OTM input is activated, the Motor will stop immediately and remain in servo-on. The Motor
can rotate in clockwise 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 of the AB parameter)
* Besides the OTP and OTM inputs, the Motor rotation can also be limited by software (software
over-travel limit function) in the Driver Unit. Refer to “9.1.5.2. Software Over-travel Limit
Switch.”
◊ When over-travel error occurs, the DRDY output will be open and LED on the front
panel indicates the following alarms.
OTP or OTM limit : F3
Software over-travel limit : F2
Figure 9-6
10ms max.
Close
Open
ON
OFF
OTP input
OTM input
DRDY output
* When the OTP or OTM input works in the middle of Home Return operation, the Motor completes
the Home Return operation after performing the following:
1 When the Motor is turning to CCW
Caution : • The OTP input is invalid (the Motor continues rotation).
• Turning on the OTM input stops the Motor immediately.
2 When the Motor is turning to CW
Caution : • Turning on the OTP input stops the Motor immediately.
• The OTM input is invalid (the Motor continues rotation).
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