Lenze DDS Global Drive PLC Developer Studio Bedienungsanleitung PDF herunterladen (Seite 29)

Function block library LenzeElectricalShaft.lib

Special functions

2.1.4 Homing function (L_REF)

2−19

LenzeElectricalShaft.lib EN 1.2

The profile generator calculates the speed profile from the set profile parameters.

· You can make parameter changes during the homing run.

– dnHomingSpeed and wTiTimeHoming become effective when bOn_b is set = FALSE

· Do not operate the drive at the torque limit ( MCTRL_bMMax_b = TRUE), otherwise the drive

cannot follow the velocity profile.

– Increase the up/down time wTiTimeHoming until MCTRL_bMMax_b no longer responds.

· The phase controller in the SB MCTRL must be switched to active.

Note for use of the FB L_REF

The L_REF function block calculates the path by measn of a er v(t) profile:

Abb. 2−12 v(t) profile

· Through the input nNAct_v , the actual speed can be read in, and the actual position can be

calculated. From this calculation, via the phase−angle controller (with MCTRL_bPosOn_b =

TRUE and if L_REF.dnPosOut_p is linked to MCTRL_dnPosSet_p) the position can be

corrected, if a deviation occurs. The correction is made up to the time t

Ta rg et

. If the deviation is

so large that the phase−angle controller cannot correct it within the time t

Ta rg et

, then a

contouring error evaluation must be performed, with the aid of the FB L_DFSET.

· The calculated position profile operates the motor control through the output

L_REF.dnPosOut_p.nNSet_a (the position profile is followed in open−loop control, not

closed−loop).

When the calculated position profile has reached L_REF.dnTargetPos_p, the homing is

finished, and L_REF.bRefOk_b is set =TRUE and L_REF.bRefBusy_b is set =FALSE.

· The output L_REF.dnActPos_p indicates the actual position that L_REF has calculated,

through L_REF.nNAct_v .

· The evaluation of a Touch Probe or zero−pulse can be made through the TP/MP−CTRL

interface (homing modes 0,1, 8 and 9).

· When the end position has been reached, the internal switch of the FB L_REF changes over,

and the values from the inputs L_REF.nNIn_a and L_REF.dnPosIn_p are connected through to

the outputs L_REF.nNSet_a and L_REF.dnPosOut_p

· If, during homing, the input bOn_b changes to FALSE, then the homing/profile is stopped, and

then continued after a fresh bOn_b=TRUE.

· The position profile will only be processed if the drive controller is enabled.

1 2 ... 24 25 26 27 28 29 30 31 32 33 34 ... 44 45

Keine Kommentare

Lenze DDS Global Drive PLC Developer Studio Bedienungsanleitung Seite 29