Retentive on-delay

Short description

A one-shot at the input triggers a configurable time. LOGO! sets the output 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).

Output Q

Q switches on upon expiration of the time T.

Parameter T

The value of another already-programmed function can provide the time in parameter T:

For the 0BA7 and later version devices, you can additionally use the actual values of the following already-programmed functions:

You select the required function by the block number.

Timing diagram

Description of the function

A 0 to 1 signal transition at input Trg triggers the current time Ta. LOGO! sets the output Q to 1 when Ta reaches the time T. A further pulse at input Trg does not affect Ta.

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

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

Overview