Retentive on-delay

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Short description

A one-shot at the input triggers a configurable time. The output is set upon expiration of this time.

 

Connection

Description

Input Trg

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

Input R

Reset the on-delay time and reset the output to 0 via input R (Reset).

Reset takes priority over Trg.

Parameter

T  is the on-delay time for the output (output signal transition 0 to 1).

Retentivity on = the status is retentive in memory.

Output Q

Q is switched on upon expiration of the time T.

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.

Timing diagram

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Description of the function

The current time Ta is triggered with a 0 to 1 signal transition at input Trg. Output Q is set to 1 when Ta reaches the time T. A further pulse at input Trg does not affect Ta.

The output and the time Ta are only reset to 0 with a 1 signal at input R.

If retentivity is not set, output Q and the expired time are reset after a power failure.

 

Overview