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2.3.2 Delay (L_DIGDEL)

Function library LenzeDrive.lib

Digital signal processing

2−30

LenzeDrive.lib EN 1.7

2.3.2 Delay (L_DIGDEL)

This FB delays binary signals.

bIn_b

L_DIGDEL

byFunction

wDelayTime

bOut_b

Fig. 2−34 Delay element (L_DIGDEL)

VariableName DataType SignalType VariableType Note

bIn_b Bool binary VAR_INPUT

bOut_b Bool binary VAR_OUTPUT

byFunction Byte VAR CONSTANT RETAIN Selection of the function

wDelayTime Word VAR CONSTANT RETAIN Delay time

Parameter codes of the instances

VariableName L_DIGDEL1 L_DIGDEL2 SettingRange Lenze

byFunction

C0720

0 ... 2

C0725 0

wDelayTime C0721 C0726 0.001 ... 60.000 s 1.000

Range of functions

 On−delay

 Dropout delay

 General delay

2.3.2.1 On−delay

byFunction = 0

bIn_b

bOut_b

wDelayTime

Fig. 2−35 On−delay

The FB L_DIGDEL operates like a retriggerable monostable circuit.

Functional sequence

1. A FALSE−TRUE transition at nIn_b starts the timer element.

2. If the delay time has elapsed, that is set by wDelayTim has elapsed, bOut_b switches

immediately = TRUE.

3. A TRUE−FALSE edge at nIn_b resets the timer element, and switches bOut_b = FALSE,

immediately.

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Lenze DDS Function library Drive Bedienungsanleitung Seite 40