Adding N integers to a PLC5-40E: 2000 Files

jubly · Apr 4, 2018

Hi everyone,
I'm a Siemens expert but currently need to do a bit of AB PLC5 work. I have a PLC5/40E. I would like to know if I can add my own N values in a separate file.
The current setup is: N7: 200 elements; N10:200, N15:500, N16:200, N17:100, N18:100, N19:1, N21:100, N25:500, N30:48. Total 1949.
Is there a limit of 2000 integers on this PLC? If so, I am assuming that I add up all the integers I have and what is left out of 2000 is what I have to play with?
If I do want to add, let's say N22, 50 integers, do I create that in the software offline and download it?
Any help/answers greatly appreciated.
Many thanks
Phil

JohnCalderwood · Apr 4, 2018

Hi Phil,

I think with the PLC5, the limit is the actual processor memory, not sure I have seen a limitation of 2000.

Go onto the tab from \project\controller\Controller properties and see what memory you have left...

To create it you have 2 ways...yes you can do this offline and download it as a project, or you can go online, put the PLC into Remote Program mode, then create your new Data File area.

In your example, as long as 22 is not used for an F or B or C or whatever data file, then the PLC will let you create it.
Once created, put the PLC back into Run mode, and use the data area.

jubly · Apr 4, 2018

Hi John,

Thanks for your answer. I have:
Memory used 33008 Words
Free memory 16144 Words

This sounds like good news. From what you're saying, I can create an area, such as B26 and put however many I like in there, and an N24 area, and put whatever I like in there, as long as I don't fill up the memory, and as long as they're not already used by anything else.

Right?

(I have done online mods before so I'm comfortable with that.)

Phil

JohnCalderwood · Apr 4, 2018

Aye, Don't fill up the memory with unnecessary data areas, as you will need the memory when editing ladder rungs, as the PLC creates a copy of the rung you are editing : so if it is a biggie, it will need plenty of space to create that copy.

But with 16k to play with, you are fine

jubly · Apr 4, 2018

Many thanks indeed John, much appreciated.

Phil

OkiePC · Apr 4, 2018

It's been awhile, but I think you are limited to 1000 elements per file.

jubly · Apr 4, 2018

Many thanks!

Mickey · Apr 4, 2018

OkiePC said:
It's been awhile, but I think you are limited to 1000 elements per file.

It depends..see pdf check revision of controller

jubly · Apr 4, 2018

Mickey,

So, going back to my original post, I can only have 1000 integers?

Mickey · Apr 4, 2018

jubly said:
Mickey,

So, going back to my original post, I can only have 1000 integers?

What is the revision letter of your processor?

"C" 1000 words N7:999, N10:199 etc.

"D" 2000 words N7:1999, N10:1999 etc.

This is per file, not per controller.

From pdf posted above:

This is the default file number and type. For this file type (integers), you can assign any file number from 3 through 999

jubly · Apr 4, 2018

Perfect; thank you.

Mickey · Apr 4, 2018

jubly said:
Perfect; thank you.

You're welcome.

Keep an eye on total memory.

Adding N integers to a PLC5-40E: 2000 Files

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