Plc addressing ?????

Hi all,

Although I'm an electronics engineer, I'm new to PLC's ! and am in the middle of doing a course. One of the questions I came across while doing it was:

What is wrong with the following program?

| 0.00 1.02 1.01 0.02 1.02 0.07
|---|/|-------||-----|-------||-----|/|--|----|/|-----O--|
| | |
| 1.03 0.04 | 1.05 |
|----||-------||-----|-------|/|---------|
|

My answer to this was that there are two contacts that are addressed the same (1.02) on the same rung.

Apparently there is another fault, but i can't seem to find out what it is???

Anyone??

Thanks alot

Bri

A better diagram

http://www.plctalk.net/qanda/showthread.php?t=55226&highlight=1.02

http://www.plctalk.net/qanda/showthread.php?t=55226

Thanks Mickey,

My diagram didn't make accross the web in ASCII !!!

However, your link has answered my question.

Thanks all

bri

I guess you are missing a coil at the end of the second line

Wow - do all these classes work out of the same textbook??