Lenze DDS v2.3 Manuel d'utilisateur télécharger pdf (Page 31)

Drive PLC Developer Studio

Program example

3-9

l DDS EN 2.3

The traffic light example requires a step for every traffic light phase.

31.Select the transition Trans0 (click the horizontal line to the left of Trans0 )toframeitwitha

dotted line.

32.Select Insert➞

➞➞

➞Step transition (after) to insert a step transition after Trans0.

33.Repeat the above step seven times to create the following sequential function chart:

– To delete a step or transition, select the step and the associated transition, otherwise they

cannot be deleted.

– First click the step, press <Shift>, then click the transition.

• Clicking the name of a transition or step directly will invert the text for editing.

34.Change the name of the first transition after Init to TRUE.

35.Change the names of all subsequent transitions to ”WAIT1.OK”.

• The first transition switches all the time, all other transitions when WAIT1 in OK becomes

TRUE , i.e. when the specified time has expired.

36.Change the names of the steps as described below (from top to bottom):

– Init (remains unchanged)

– CHANGE1

– GREEN1

– CHANGE2

– RED1

– CHANGE3

– GREEN2

– CHANGE4

– RED2

• ”CHANGEx” stands for a amber phase each time, “GREEN1” means that traffic light 1 will be

green and “GREEN2” applies for traffic light 2, “RED1” means that traffic light 1 will be red

and “RED2” applies for traffic light 2.

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Lenze DDS v2.3 Manuel d'utilisateur Page 31