Help with Ladder diagram

[Ranjit05]

Hi,
Can anyone help with the problem given below:

IO list

1 x Start Button
1 x Stop Button
2 x Selector switches
3 x Lamps


SEQUENCE

Selector Switch 1 is for Sequence

Sequence 1

Lamp 1 on 0.25s
All lamps off 0.25s
Lamp 2 on 0.25s
All lamps off 0.25s
Lamp 3 0.25s
All Lamps off 0.25s

Repeat

Sequence 2

All lamps on 0.25s
All lamps off 0.25s

Repeat


STOPPING MODE

Selector Switch 2 is for Stopping Mode

Stopping Mode 1 – When stop button pressed the sequence that is running will stop immediately – all off
Stopping Mode 2 – When stop button pressed the sequence that is running will finish the sequence and then stop – all off


EXERCISE

Write PLC program so that when the start button is pressed the selected sequence will run.
When the stop button is pressed the selected stopping mode occurs.

Pressing the start button will start selected sequence from beginning of sequence.

 

[IRstuff]

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