Sigma-II Series SGM*H/SGDH USER'S MANUAL - Esco Drives ...

8 Operation8.3.3 Setting the Overtravel Limit Function8.3.3 Setting the Overtravel Limit FunctionThe overtravel limit function forces movable machine parts to stop if they exceed the allowable range of motionand turn ON a limit switch.(1) Connecting the Overtravel SignalTo use the overtravel function, connect the following overtravel limit switch input signal terminals.Type Name Connector PinNumberInput P-OT CN1-42(Factory setting)Input N-OT CN1-43(Factory setting)SettingON (low level)OFF (highlevel)ON (low level)OFF (highlevel)Connect limit switches as shown below to prevent damage tothe devices during linear motion.Rotation in the opposite direction is possible during overtravel.For example, reverse rotation is possible during forwardovertravel.MeaningForward rotation allowed. Normal operation status.Forward rotation prohibited. Forward overtravel.Reverse rotation allowed. Normal operation status.Reverse rotation prohibited. Reverse overtravel.Servomotor• IMPORTANTWhen the servomotor stops due to overtravel during position control, the position error pulses are held. A clear signal(/CLR) input is required to clear the error pulses.LimitswitchLimitswitchMotor forward rotation directionP-OTN-OTSERVOPACKCN14243When 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 Pn001 = n.1.Refer to (3) Selecting the Motor Stop Method When Overtravel is Used in this section.(2) Enabling/Disabling the Overtravel SignalCAUTIONA parameter can be set to disable the overtravel signal. If the parameter is set, there is no need to wire theovertravel input signal.ParameterMeaningPn50A n.2 Inputs the Forward Run Prohibited (P-OT) signal from CN1-42. (Factory setting)n.8Disables the Forward Run Prohibited (P-OT) signal. (Allows constant forward rotation.)Pn50B n.3 Inputs the Reverse Run Prohibited (N-OT) signal from CN1-43. (Factory setting)n.8 Disables the Reverse Run Prohibited (N-OT) signal. (Allows constant reverse rotation.)• Applicable control methods: Speed control, position control, and torque control• After changing these parameters, turn OFF the main circuit and control power supplies and then turn them ON again toenable the new settings.* A parameter can be used to re-allocate input connector number for the P-OT and N-OT signals. Refer to 7.3.2 Input CircuitSignal Allocation.8-20