Functions in Ladder Logic

namang · Apr 25, 2016

Hello,

I wanted to know if it is possible to create a user defined function in Ladder Logic when programming through Studio 5000. I intend to write a specific logic, then move it all into one single block (the "function"). Can I then just call this one single block later into the program, instead of having to write all the logic once again?

Thanks.

rollinstone · Apr 25, 2016

Well I guess it's the main purpose of functions

namang · Apr 25, 2016

Exactly, so I how do I create such functions in Studio 5000 Ladder Logic ?

amberman · Apr 25, 2016

namang said:
Exactly, so I how do I create such functions in Studio 5000 Ladder Logic ?

Use Add-On Instructions. Fine for small bits of well proven repeated code e.g ramping/conversions etc. but for bigger chunks or for code you want to monitor then I think it's better to chuck them in their own routines to be copied and pasted as necessary.

widelto · Apr 25, 2016

Go to:
http://literature.rockwellautomation.com/idc/groups/literature/documents/pm/1756-pm010_-en-p.pdf
Download it and you'll learn how to create an AOI (add on instruction)

AshleyParr · Apr 25, 2016

Use add on instructions (AOIs), brilliant for code that is repeated alot and doesnt change.

As mentioned above for large amounts of code or code that you may want to modify anytime then maybe routines may be the best bet for you as modifying an AOI will require a download

Ash

ASF · Apr 25, 2016

As others have said, an AOI (Add-On Instruction) is probably the closest equivalent to "function block" in AB land. You can also use a subroutine and call it as many times as you want with different input and output parameters. Each method has it's pro's and cons, and it depends on your application and what things are more important that others in your task.

But FWIW, I use AOI's like they're going out of fashion, but very rarely a subroutine in that way. So my first port of call would be the AOI information widelto linked to above.

Operaghost · Apr 25, 2016

Open a project in Studio 5000
Click Help then Learning Center
Click What's New
Select Introduction to Add-On Instructions
Watch tutorial
Click Creating Add-On Instruction
Watch tutorial
Make profit

OG

RET · Apr 25, 2016

Operaghost said:
Open a project in Studio 5000

yadayadayada

Make profit

OG

Fixed that for ya

ASF · Apr 25, 2016

You forgot Step 4: Drink Beer and Celebrate

namang · Apr 25, 2016

Thank you very much for the help.

Functions in Ladder Logic

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