rslogix 5000 use of compare instruction to add-on-instrunction

[md.abdullah]

can i include some compare instructions or any instruction to the my add on instruction or in the udt in rslogix5000.i know this may be possibly not happen but
any suggest..to use the compare instructions in the add-on-instruction

 

[MarkNightingale]

Yes you can use a COMpare instruction in an Add On Instruction, an Add On Instruction can use nearly all of the instructions available in ladder.

A UDT however is basically a bunch of tags in a structure, and as there is no logic in the UDT a COMpare instruction can't be used.

Mark

 

[md.abdullah]

thank you mark
but how can i use compare in add on instruction
can you attached some example

 

[MarkNightingale]

Use it exactly the same as you would in ladder logic.

Mark

 

[md.abdullah]

mark i am not getting you
how can i insert a limit test into the add on instruction

 

[MarkNightingale]

You use the instructions the same as you would in ladder logic.

Go to the AOI, open the logic and program away!!!

Mark

Edit. Without sounding too harsh if you don't understand how the AOI's work I would read the manual before using them.

 

[md.abdullah]

in your example where is AOI
means
i want inside the AOI of a compare logic
is it possible?

 

[MarkNightingale]

Take a look at this picture.

Mark

 

[fuzzy logic]

Hmmm.. md.abdullah, I may suggest a proper read of the Logix5000 Controllers Add-On Instructions Programming Manual, first...

Maybe it could clear you how the Add On Instruction operates and the best way to use it, avoiding you to have issue in wrongly using it...

You may, after that, ask here for a more specific questions, if needed.

- fuzzy logic

 

[rdrast]

Put down the chocolate-covered banana and step away from the European currency systems.


Seriously. Read the Manual. Write some SIMPLE test programs. Run them. Debug them.

This is a place to get HELP, not to be spoon fed basic knowledge from the alphabet on up.

 

[MarkNightingale]

Put down the chocolate-covered banana and step away from the European currency systems.

That made me chuckle

Mark

 

[md.abdullah]

thanks to all
but i have made a AOI for scaling and its working
but there is certain condition in which i have to made a AOI
which will work in my ladder for the reusable way so i was trying
to find the solution. as i made ladder logic but it got very big so for the optimization i was just asking about it...for the suggest

 

[TConnolly]

Ten Easy Steps.

1)Open your add on instruction in the project tree.
2)Open Logic.
3)Navigate to where you want to insert the add on instruction.
4)Press insert.
5)Pick Insert Rung
6)Double click the rung number to the right of the rung.
8)A input box with a cursor in it will appear at the top of your ladder window - this is the mnemonic editor.
7)Type CMP in the mnemonic editor.
8)Press enter.
9)The CMP instruction will be inserted on your new rung.
10)Fill in the comparison statement.

 

[md.abdullah]

thanks alaric now i got

 

[md.abdullah]

thats general things that you all guys said