Lenze DDS Function library Drive - Manual (Page 40)

2.3.2 Delay (L_DIGDEL)
Function library LenzeDrive.lib
Digital signal processing
2−30
L
LenzeDrive.lib EN 1.7
2.3.2 Delay (L_DIGDEL)
This FB delays binary signals.
bIn_b
L_DIGDEL byFunction
0 t
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 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
t
t
bIn_b
bOut_b
wDelayTime 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.