Specifications

Applications Ver. 0002 AP - 9

Feedback parameter setting at the spindle drive in closed loop:

With SERCOSLE=0

Using external feedback requires all the feedback parameters to be set at the CNC 50/55:

NPULSES (P013), DIFFBACK (P014), FBACKAL(P015) and REFPULSE (P032).

With SERCOSLE=1

When no external encoder is used, the motor encoder may be used by setting

SERCOSLE=1 at the CNC 50/55. At the drive, the existing gear ratios must be set by

means of GP6 -F00717-, NP121 -S00121-, NP122 -S00122- and NP123 -S00123-.

At the CNC 50/55, the feedback parameters mentioned earlier are ignored.

Important:

When working with SERCOSLE=1, the motor feedback is only useful to work in M19

mode and/or Rigid Tapping when the spindle only has one gear and the Gear Ration

meets one of these two conditions:

- The Gear Ratio is 1/1. The Reference mark of the spindle (I

) is that of the motor

feedback.

- The Gear Ratio is of the n/1 type where "n" is an integer (no decimals). In this

case, a microswitch must be used for selecting a particular reference pulse

among the "n" signals generated by the motor encoder per spindle turn.