Lenze EVS9332xK Manual de usuario descargar pdf (Pagina 118)

Function library

Function blocks

3.2.23 Virtual clutch (CLUTCH2)

3−90

EDSVS9332K−EXT EN 4.0

3.2.23.1 Clutch engagement through ramp function with following synchronous running

max

n=const.







Fig. 3−60 Transition characteristic of a cam drive when engaging the clutch and then running synchronously

After the cam drive has paused − mostly process−related − it can be synchronized again to the process

with a constantly operating master drive with CLUTCH2. At the time of engaging  both drives have

synchronous speeds and the same positions.

In Fig. 3−60,  the catching−up process is started. The distance required at this time(CLUTCH2−DIST)

is calculated from the following parameters:

l Ramp gradient, code C1412/5 (see Fig. 3−60, )

l n

max

of the cam drive

CLUTCH2−DIST is available at the output of the function block and is a measure for the distance still

to be caught up. If CLUTCH2−DIST = 0, the clutch can be closed (CLUTCH2−CLOSE=HIGH) due

to the synchronous behaviour of both drives (Fig. 3−60, ).

) Note!

l Clutch engagement only possible when drive is rotating in CW direction.

l Connect the output CDATA−ACTLEN (function block CDATA) with the input

CLUTCH2−LEN to determine the position of the X axis (master).

3.2.23.2 Direct clutch engagement

The clutch immediately closes when CLUTCH2−SEL = HIGH.

) Note!

Please observe that the command CLUTCH2−SEL = HIGH has priority over all other

commands at function block CLUTCH2.

This function is only suitable for drives at stand still.

3.2.23.3 Disengagement of the clutch

When CLUTCH2−CLOSE = LOW the clutch is opened immediately. The drive is braked to standstill

via an adjustable ramp (C1412/4).

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Lenze EVS9332xK Manual de usuario Pagina 118