Lenze DDS Function library Drive Manuel d'utilisateur télécharger pdf (Page 47)

Function library LenzeDrive.lib

Digital signal processing

2.3.7 Edge evaluation (L_TRANS)

2−37

LenzeDrive.lib EN 1.7

2.3.7.2 Evaluate falling edges

byFunction = 1

bIn−b

bOut_b

wPulseTime wPulseTime

Fig. 2−47 Evaluation of TRUE−FALSE transitions

Functional sequence

1. If a TRUE−FALSE or a FALSE−TRUE transition occurs at nIn_b, then bOut_b switches = TRUE.

2. After the time defined as wPulseTime has elapsed, then bOut_b switches = FALSE, provided

no further TRUE−FALSE transition has occurred at nIn_b.

2.3.7.3 Evaluate rising and falling edges

byFunction = 2

bIn_b

bOut_b

wPulsTime wPulsTime

Fig. 2−48 Evaluation of both transitions

Functional sequence

1. If a TRUE−FALSE or a FALS−TRUE transition occurs at nIn_b, then bOut_b switches = TRUE.

2. After the time defined as wPulseTime has elapsed, then bOut_b switches = FALSE, provided

no further TRUE−FALSE or FALSE−TRUE transition has occurred at nIn_b.

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Lenze DDS Function library Drive Manuel d'utilisateur Page 47