Lenze EVS9332xP Manuel d'utilisateur télécharger pdf (Page 78)

Function library

Positioning control

3.4.8 Homing

3−50

EDSVS9332P−EXT DE 2.0

3.4.8.5 Homing modes 2 and 3

Purpose

l Homing in absolute positioning mode (C1210 = 0, 2), with finite traversing range and existing

travel range limit switches (POS−LIM−xxx).

l The homing switch (POS−REF−MARK) is always found. In the worst case the entire traversing

range will be searched.

Approach end of travel range limit switch, reverse and move to reference point via homing

switch

Mode 2: Traversing direction to positive end of travel range limit switch

Set C1213 = 2.

Homing switch (POS-REF-MARK)

Zero pulse / Zero position

End of

travel switch

(POS-LIM-POS)

Home position

End of

travel switch

(POS-LIM-NEG)

9300pos053

Fig. 3−17 Move to POS−LIM−POS, reverse, move to reference point via POS−REF−MARK

Function sequence

l Move to positive travel range limit switch with homing speed C1242.

l Reverse there and move beyond the reference switch to the reference point with homing

speed C1242. In this case no fault (PO2) is indicated!

l The reference point is at the first zero pulse / zero position of the position encoder after leaving

the homing switch.

l If the drive is already on the positive end of travel range limit switch before homing, it is

reversed immediately.

l If the drive is positioned at the reference switch when homing is started, the switch will be

overtravelled. The drive then goes on to the limit switch and reverses there.

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Lenze EVS9332xP Manuel d'utilisateur Page 78