Lenze DDS Function library Drive Manuel d'utilisateur télécharger pdf (Page 38)

2.2.16 S−ramp generator (L_SRFG)

Function library LenzeDrive.lib

Analog signal processing

2−28

LenzeDrive.lib EN 1.7

Function

Load ramp generator

 By using bLoad_b = TRUE loads the ramp generator with the signal at nSet_a.

 This value is instantly accepted and output to nOut_a. No ramp−up or ramp−down through an

S−curve takes place.

 As long as bLoad_b remains = TRUE, the ramp generator is disabled.

Acceleration and jerk

The maximum acceleration and the jerk can be adjusted separately.

n I n _ a

n O u t _ a

d w T i

d w J e r k

D e l t a O u t _ a

Fig. 2−31 Line diagram

 Acceleration

 Jerk

 Max. acceleration:

– By using dwTi you set the positive as well as the negative acceleration.

– The setting is calculated according to the formula:

1s @ 100%

dwTi

 Jerk:

– By using dwJerk you set up a jerk−free acceleration of the drive.

– The jerk is entered in [s] until the ramp generator operates with maximum acceleration (see

Fig. 2−31).

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Lenze DDS Function library Drive Manuel d'utilisateur Page 38