8.1 System Configuration and Connection Example for SERVOPACK with Fully-closed Loop Control8-78 Fully-closed Loop Control8.1.5 Encoder Output Pulse Signals from SERVOPACK with an External Encoderby Renishaw plcThe output position of the zero point signal (Ref) will depend on the direction of movement for some modelsof external encoders by Renishaw plc.In such case, the phase-C pulses of the SERVOPACK are output at two positions.For details on the specifications of the zero-point signals for a external encoder, refer to the manual for theRenishaw external encoder.(1) When Passing 1st Zero Point Signal (Ref) in Forward Direction and Returning afterPower ON(2) When Passing 1st Zero Point Signal (Ref) in Reverse Direction and Returning afterPower ONMachine positionPower ONPhase-C detection positionPhase-C detection positionZero point signal㧔Ref㧕Phase CTimeSecond pulse is half as wideas the phase-A pulse.No zero point signal (Ref) is sent from the external encoder.However, a phase-C pulse will be sent from the SERVOPACKwhen moving in the reverse direction, because it is the sameposition from which a phase-C pulse was sent from theSERVOPACK when moving in a forward direction.Machine positionPower ONZero point signal㧔Ref㧕Phase CTimeSecond pulse is half as wideas the phase-A pulse.No zero point signal (Ref) is sent from the external encoder.However, a phase-C pulse will be sent from the SERVOPACKwhen moving in the forward direction, because it is the sameposition from which a phase-C pulse was sent from theSERVOPACK when moving in a reverse direction.Phase-C detection positionPhase-C detection position
