9.1 System Configuration and Connection Example for SERVOPACK with Fully-closed Loop Control9-99 Fully-closed Loop Control9.1.7 Encoder Output Pulse Signals from SERVOPACK with a External Encoderby RenishawThe output position of the zero point signal (Ref) may vary in some models of the external encoder made byRenishaw.If using a Renishaw model, 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 the 1st Zero Point Signal (Ref) in Positive Direction after Power ON(2) When Passing the 1st Zero Point Signal (Ref) in Negative Direction after Power ONMachine position (Positive direction)Power 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 negative direction, because it is the sameposition from which a phase-C pulse was sent from theSERVOPACK when moving in a positive direction.Machine position (Positive direction)Power 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 positive direction, because it is the sameposition from which a phase-C pulse was sent from theSERVOPACK when moving in a negative direction.
