Short description
An input pulse generates a preset number of output pulses with a defined pulse/pause ratio (retriggerable), after a configured delay time has expired.
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Connection |
Description |
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Input Trg |
You trigger the times for the Edge-triggered wiping relay with a signal at input Trg (Trigger). |
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Input R |
The output and the current time Ta resets to 0 with a signal at input R. |
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Parameter |
T H , T L : The pulse width T H and the interpulse width T L are adjustable.
N determines the number of pulse/pause cycles T
L
/T
H: |
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Output Q |
Output Q sets when the time T L has expired and resets when T H has expired. |
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0BA2, 0BA3: |
Parameters TH and TL
The actual value of another already-programmed function can provide the pulse width TH and the interpulse width TL:
Analog comparator: Ax - Ay
Analog threshold trigger: Ax
Analog amplifier: Ax
Analog multiplexer: AQ
Analog ramp: AQ
Mathematic instruction: AQ
PI controller: AQ
Up/Down counter: Cnt
For the 0BA7 and later version devices, you can additionally use the actual values of the following already-programmed functions:
On-delay: Ta
Off-delay: Ta
On-/off-delay: Ta
Retentive on-delay: Ta
Wiping relay(pulse output): Ta
Edge triggered wiping relay: Ta
Asynchronous pulse generator: Ta
Stairway light switch: Ta
Multiple function switch: Ta
Stopwatch: AQ
Analog filter: AQ
Average value: AQ
Max/Min: AQ
Threshold trigger: Fre
You select the required function by the block number.
Timing diagram
Description of the function
The change at input Trg to 1 triggers the time TL (time low). After the time TL has expired, LOGO! sets the output Q to 1 for the duration of the time TH (time high).
If LOGO! retriggers the input Trg prior to the expiration of the preset time (TL + TH), the time Ta resets and the pulse/pause period is restarted.