Lenze DDS Global Drive PLC Developer Studio - Manual (Page 30)

Function block library LenzeElectricalShaft.lib
Special functions
2.1.4 Homing function (L_REF)
2−20
L
LenzeElectricalShaft.lib EN 1.2
2.1.4.2 Homing Modes
The home position is defined by:
·
the homing mode byHomingMode
·
the reference point offset dnRefOffset
Note!
When using feedback from a resolver,the zero position is used, not the zero−pulse (depending on the
resolver attached to the motor), and, for homing with the TouchProbe, the TouchProbe phase−angle.
Homing with a reference switch to zero pulse (MP)/zero position or TouchProbe (TP)
via the TP/MP−CTRL interface
The reference point is situated after the TRUE−FALSE edge of the reference switch bMark_b , at the
next zero−pulse/zero position, or TP plus the reference mark offset:
·
It depends on the setting of the system block that provides the actual speed, whether homing
is made to zero−pulse/zero position or TouchProbe:
– With SB MCTRL_MotorControl the setting is made through C0911 (0=MP, 1=TP via E4).
– With SB DF_IN_DigitalFrequency the setting is made through C0428 (0=MP, 1=TP via E5).
– For further information, see the description for SB MCTRL_MotorControl and SB
DF_IN_DigitalFrequency in the Manual 9300 Servo PLC".
·
Mode 0 ( byHomingMode = 0):
– Move to the home position in CW rotation.
– Home position offset dnRefOffse is entered as positive.
R S
T P / 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. 2−13 Homing with zero−pulse/zero position or TouchProbe; moving to the reference mark in the cw direction of rotation
 Distance
‚ Start position
ƒ Direction
„ Home position