Lenze DDS Global Drive PLC Developer Studio Uživatelský manuál stáhnout pdf (Strana 35)

Function block library LenzeElectricalShaft.lib

Special functions

2.1.4 Homing function (L_REF)

2−25

LenzeElectricalShaft.lib EN 1.2

Example

The motor should make a 10−turn (left/ccw rotation) relative positioning movement, and then stop.

Settings:

· byHomingMode = 20

· L_REF.RefOffset = 0

After operation of DIGIN_bIn1_b =TRUE, the motor rotates for 10 turns in a left/ccw direction.

· If the value L_REF.dnActPos_p is positive, the motor rotates left/ccw, if it is negative, the

motor rotates in a cw direction!

· If a reference point offset is also defined then with a

– positive offset, the relative position = L_REF.dnActPosIn_p − L_REF.RefOffse

– negative offset, the relative position = L_REF.dnActPosIn_p + L_REF.RefOffset

L _ R E F

d n A c t P o s I n _ p

b P o s L o a d _ b

b O n _ b

n N A c t _ v

n N I n _ a

d n P o s I n _ p

n N S e t _ a

d n P o s O u t _ p

6 5 5 3 6 0

D I G I N _ b I n 1 _ b

M C T R L _ n N A c t _ v

M C T R L _ n N S e t _ a

M C T R L _ d n P o s S e t _ p

T O N

D I G I N _ b I n 1 _ b

t # 5 0 0 m s

S o l l w e r t f ü r W i n k e l r e g l e r n a c h

B e e n d i g u n g d e r P o s i t i o n n i e r u n g

Abb. 2−19 Example of relative positioning

(Legend: Sollwert für Winkelregler nach ..... = Setpoint for phase−angle controller at the end of positioning)

2.1.4.4 Output of status signals

· With bBusy_b = TRUE, the homing function is active:

– The profile generator is connected to the outputs dnPosOut_p and nNSet_a

· With bBusy_b = FALSE, the homing function is not active (or finished):

– The inputs dnPosIn_p and nNIn_a are connected through to the outputs dnPosOut_p

and nNSet_a

· With bRefOk_b = TRUE, the homing run has been ended successfully:

– Homing is completed if the setpoint of the profile generator has reached the home position.

– Any possible contouring error is transmitted to the FB L_DFSET and compensated unless

the drive is operating at the torque limit.

· With bRefOk_b = FALSE:

– Homing is currently being carried out or

– the reference point is no longer known, e.g. due to interference, or

– homing was interrupted.

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