Elevators programming help

mikedog · Feb 24, 2006

I am doing a school project, We have to make 4-floor elevator logic program. I have some of the program but do I need to put in a JSR or a jump ? in my program.

how to use a SR ? help

martin3885 · Feb 24, 2006

Whether you need or not you have to decide allone. You are the programmer!

Just try to use it and then you can see how it works.

how to use a SR?

The easiest method to see how to use SR(or anything in Step7) is to add SR function to your program(no matter where), to select it and just hit F1 button.

davidg68124 · Feb 24, 2006

I assume you are referring to Rockwell Software product so I will answer this with that in mind. If you put any logic in a ladder file OTHER than Ladder 2 or Main, you will need to use a JSR (Jump to Subroutine) in the main file in order to scan that logic.

If, however, you want to have that ladder scanned without a JSR you are then working with Selectable Timed Interrupts and Digital I/O interrupts. Ignor this for now.

David

TimothyMoulder · Feb 24, 2006

Why do you want to use subroutines? Do you want to place the different floor movements in them, then call them from a main by button press?

Not being critical, just need more info.

TM

Steve Bailey · Feb 24, 2006

Mikedog,

Can you see the importance of asking a good, unambiguous question? You have two responders with two different assumptions about what brand of PLC you're using. Better questions generate better answers.

davidg68124 · Feb 24, 2006

Hopefully he will give us more info on what he is really looking for.

David

mikedog · Feb 24, 2006

do anyone kwon how to use a sr latch and a relay in elevator circuits?

Steve Bailey · Feb 24, 2006

do anyone kwon how to use a sr latch and a relay in elevator circuits?

Yes.

For additional information, refer to post #5 in this thread.

mikedog · Feb 24, 2006

thank for the help guys

Lancie1 · Feb 25, 2006

Mikedog,

I suggest splitting your Elevator program into the following Subroutines:

1 First-Scan Initialization
2 Floor Requests
3 Do Next Request or Wait
4 Close Door Then Move
5 Track Car Movement
6 Stop & Open Door
7 Alarms & Troubleshooting

Elevators programming help

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