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Function block library LenzeElectricalShaft.lib

Special functions

2.1.4 Homing function (L_REF)

2−20

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.

T P / n N A c t _ v

b M a r k _ b

d n R e f O f f s e 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

 Direction

 Home position

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Lenze DDS Global Drive PLC Developer Studio Manuale Utente Pagina 30