Lenze DDS Global Drive PLC Developer Studio - Manual (Page 31)

Function block library LenzeElectricalShaft.lib
Special functions
2.1.4 Homing function (L_REF)
2−21
L
LenzeElectricalShaft.lib EN 1.2
·
Mode 1 ( byHomingMode = 1):
– Move to the home position in CCW rotation.
– Home position offset dnRefOffset is entered as negative.
R S
n N A c t _ v
b M a r k _ b
Q
d n R e f O f f s e t
T
Abb. 2−14 Homing with zero−pulse/zero position or TouchProbe; moving to the reference mark in the ccw (left) direction of rotation
 Distance
‚ Start position
ƒ Direction
„ Home position
Function for homing with a reference switch to zero−pulse (MP)/zero position
via the TP/MP−CTRL interface
·
In this case, the reference offset is set to dnRefOffset =0.
·
If MP is known, the drive moves back to the last zero pulse after a negative edge of
L_REF.nMark_b.
·
If the drive starts from a position on an MP, after L_REF.nMark_b =TRUE, then it moves to the
next MP.
This applies to Modes 0 and 1, with homing to zero−pulse (MP)/zero position, using a reference
switch.
| s | [ i n c ] M P M P M P
M C T R L _ d n P o s _ p
L _ R E F . b M a r k _ b
L _ R E F . n O n _ b
L _ R E F . n O n _ b
M C T R L _ d n P o s _ p
L _ R E F . b M a r k _ b
M C T R L _ d n P o s _ p
L _ R E F . b M a r k _ b
L _ R E F . n O n _ b
Abb. 2−15 Function for homing with a reference switch to zero−pulse /zero position