Rockwell-automation T80004 Application Note Field Loop Configuration Manuel d'utilisateur télécharger pdf (Page 42)

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AN-T80004 Field Loop Configuration

Issue 10 Jun 13 AN-T80004 42

The pulse width bias factor is used when the valve moves faster in one direction than the other for the

same pulse width. It has the following effect on the output.

Bias factor = 1.0 Mark-space ratio = IO input

Bias factor < 1.0 ‘Closing’ pulse ratio is multiplied by bias factor. ‘Opening’ pulse ratio is

unaffected.

Bias factor > 1.0 ‘Opening’ pulse ratio is divided by bias factor. ‘Closing’ pulse ratio is

unaffected.

A bias factor of 2 will result in an opening output pulse width of 50% for an input of 100%. A bias factor

of 0.5 will result in a closing output pulse width of 50% for an input of -100%.

The function block is available from ICS Triplex Technology. Contact [email protected].

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Rockwell-automation T80004 Application Note Field Loop Configuration Manuel d'utilisateur Page 42