On-delay

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Short description

The output is not switched on until a configured delay time has expired.

 

Connection

Description

Trg input

The on-delay time is triggered via the Trg (Trigger) input.

Parameter

T  represents the on-delay time after which the output is switched on (output signal transition 0 to 1).

Retentivity on = the status is retentive in memory.

Output Q

Q switches on after a specified time T has expired, provided Trg is still set.

Parameter T

The time in parameter T can be provided by the value of another already-programmed function:

You select the required function by the block number.

For information on the validity and accuracy of the time base, refer to the LOGO! manual.

Timing diagram

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Description of the function

The time Ta (the current time in LOGO!) is triggered with the 0 to 1 transition at input Trg.

If the status at input Trg stays 1 at least for the duration of the configured time T, the output is set to 1 when this time has expired (the on signal of the output follows the on signal of the input with delay).

The time is reset if the status at input Trg changes to 0 again before the time T has expired.

The output is reset to 0 when input Trg is 0.

 

Overview