Wiping relay (pulse output)

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Short description

An input signal generates an output signal of a configurable length.

 

Connection

Description

Input Trg

You trigger the time for the wiping relay with a signal at input Trg (Trigger).

Parameter

T  represents the time after which the output is reset (output signal transition 1 to 0).

Retentivity set (on) = the status is retentive in memory.

Output Q

A pulse at Trg sets Q. The output stays set until the time T has expired and if Trg = 1 for the duration of this time. A 1 to 0 transition at Trg prior to the expiration of T also resets the output to 0.

Parameter T

The off time T can be provided by the actual 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

With the input signal Trg = 1, output Q is set to 1. The signal also triggers the time Ta, while the output remains set.

When Ta reaches the value defined at T (Ta=T), the output Q is reset to 0 state (pulse output).

If the signal at input Trg changes from 1 to 0 before this time has expired, the output is immediately reset from 1 to 0.

 

Overview