Watlow LogicPro Uživatelský manuál stáhnout pdf (Strana 101)

LogicPro User’s Guide Chapter 8: Ladder Diagrams

Doc.# 28002-00 Rev 3.00 Watlow Anafaze 85

On To Off Transitional Contact

The [On to Off Transitional Contact] tool allows you to

insert on to off transitional contacts into the program window.

The On To Off Transitional Contact is sometimes known as

the Negative Transitional Contact.

During a single evaluation of the Ladder diagram, if the

Variable associated with this contact changes from True to

False, then the contact will close for this cycle only. Thus

allowing electricity to flow to the next element on the rung.

For all other conditions this contact remains in the Open state.

To use On to Off Transitional Contact:

1. Select the [On to Off Transitional Contact] tool

2. Position the pointer where you want the contact placed

and click.

Normal Coil

The [Normal Coil] tool allows you to insert normal output

coils into the program window.

The Normal Coil is set to On when all of the contacts on the

Ladder rung pass power to the coil from the left power rail.

This coil or Function Block remains On until one of the

contacts opens and stops sending power to the coil.

To use the Normal Coil:

1. Select the [Normal Coil] tool.

2. Position the pointer where you want the coil placed and

click.

Latched Coil

The [Latched Coil] tool allows you to insert latched coils

into the program window

The Latched Coil, sometimes known as a Set coil, is set to On

when all of the contacts or Function Blocks on the Ladder

rung pass power to the coil from the left power rail. This coil

remains latched On until it is reset by a Reset (Unlatched)

coil.

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Watlow LogicPro Uživatelský manuál Strana 101