Estun pronet series, User Manual

Page: 74 / 193

ProNet Series AC Servo User's Manual
- 72 -
4.3.3 Setting the Overtravel Limit Function
The overtravel limit function forces movable machine parts to stop if they exceed the allowable range of motion and turn
ON a limit switch.
(1)Connecting the overtravel signal
To use the overtravel function, connect the following overtravel limit switch to the corresponding pin number of servo drive
CN1 connector correctly.
Type Signal Name Pin No. Setting Meaning
Input P-OT
CN1-16
(factory setting)
ON(low level)
Forward rotation allowed. (Normal
operation status.)
OFF(high level)
Forward rotation prohibited.
(Forward overtravel)
Input N-OT
CN1-17
(factory setting)
ON(low level)
Reverse rotation (Normal operation
status.)
OFF(high level)
Reverse rotation prohibited.
(Reverse overtravel)
Connect limit switches as shown below to prevent damage
to the devices during linear motion.
Rotation in the opposite direction is possible during
overtravel.
For example, reverse rotation is possible during forward
overtravel.
Servomotor forward rotation direction.
Servodrive
Servomotor
Limit switch Limit switch
P-OT
N-OT
CN1
16
17
■ Important
When using overtravel to stop the servomotor during position control, the position error pulses are present. A clear signal
(CLR) input is required to clear the error pulses.
When using the servomotor on a vertical axis, the workpiece may fall in the overtravel condition.
To prevent this, always set the zero clamp after stopping with Pn004.0=5.