Lenze DDS v2.3 Bedienungsanleitung PDF herunterladen (Seite 33)

Drive PLC Developer Studio

Program example

3-11

l DDS EN 2.3

40.Enter the following actions for the step “Init” into the editor window and define the actions for

the other steps in the same way.

Step Actions Status Light1/Light2

Init CAL LIGHT1(STATE:=3)

CAL LIGHT2(STATE:=3)

CHANGE1 CAL LIGHT1(STATE:=4)

CAL LIGHT2(STATE:=3)

CAL WAIT1(SETTIME:=t#2s)

GREEN1 CAL LIGHT1(STATE:=1)

CAL LIGHT2(STATE:=3)

CAL WAIT1(SETTIME:=t#5s)

CHANGE2 CAL LIGHT1(STATE:=2)

CAL LIGHT2(STATE:=3)

CAL WAIT1(SETTIME:=t#2s)

RED1 CAL LIGHT1(STATE:=3)

CAL LIGHT2(STATE:=3)

CAL WAIT1(SETTIME:=t#1s)

CHANGE3 CAL LIGHT1(STATE:=3)

CAL LIGHT2(STATE:=4)

CAL WAIT1(SETTIME:=t#2s)

GREEN2 CAL LIGHT1(STATE:=3)

CAL LIGHT2(STATE:=1)

CAL WAIT1(SETTIME:=t#5s)

CHANGE4 CAL LIGHT1(STATE:=3)

CAL LIGHT2(STATE:=2)

CAL WAIT1(SETTIME:=t#2s)

RED2 CAL LIGHT1(STATE:=3)

CAL LIGHT2(STATE:=3)

CAL WAIT1(SETTIME:=t#1s)

This completes the first phase of our program. You can now compile the program and test it in a

simulation.

3.2.8 Extending the program with an alternative branch

To include at least one alternative branch in our chart so that we can turn the traffic lights off over

night, we will include a counter to deactivate the system after a specific number of traffic light cycles.

Firstly, we will need a new variable COUNTER of type INT.

41.To edit the organization unit PLC_PRG, activate its editor window by selecting

Object

Organizer

,tab

Organization units

and double-clicking PLC_PRG .

42.Use the declaration editor to declare as local variable (between the keywords VAR and

END_VAR) the variable COUNTER of type INT.

43.Initialize the variable COUNTER in the step “Init” with 0:

Step Actions Status Light1/Light2

Init CAL LIGHT1(STATE:=3)

CAL LIGHT2(STATE:=3)

LD 0

ST COUNTER

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