SCP analog in on ab 1100

c.witschen

Member
Join Date
May 2006
Location
St Cloud, MN 56304
Posts
5
I am starting simple-- I have a micro logix 1100 L16AWA

I just want to take my 0-10 v input and convert to 0- 250 psi to turn off and on things.

On the rung I have the SCP screen up but I do not know how to address the anolog input is I:V/1.


Also what to the other numbers mean?


Clarence
 
The input is the address of the analog input you are using.
The input min and max are the range of your analog input, in your case 0 is and 10.0 is max.
The scaled min and max are what you want the output to be scaled as, in your case saled min is 0 and scaled max is 250.
The output is where the scaled result is to be stored , usually a floating integer file such as F8:0. You can then use this float integer file value in LIM instructions, or compare instructions to accomplish turning things on and off.
 
Valid input addresses for a four point analog card at slot 1 would be I:1.0, I:1.1, I:1.2, and I:1.3. If you have configured the IO already then you should be able to see the valid addresses by double clicking on the I file in the project tree in Logix 500.

I suggest you download the instruction set reference and users manual for the ML1100 from AB's literature library and read the sections on addressing to understand how the AB file/element addressing works. If you don't take the time now to understand that you will endure a lot more pain than is necessary.
 
The two analog inputs on the base unit of your ML1100 are addressed as followed.

IV1- input 0 is addressed I:0.4
IV2- input 1 is addressed I:0.5

A 0-10v input will give you a 0-1023 raw data value. See picture below for scaling example. If you want a decimal value for the scaled value then change
N7:0 to a floating point data file (e.g.F8:0 and change the scaled min and scaled max to 0.0 to 250.0)

scaledvalue.jpg
 
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the unit itself has two analogs in IV1(+) IV2(+) I do not know how to configue or address these?

As suggested by Aleric, Manuals are always helpful.

User Manual:

http://literature.rockwellautomation.com/idc/groups/literature/documents/um/1763-um001_-en-p.pdf

Instruction Reference:

http://literature.rockwellautomation.com/idc/groups/literature/documents/rm/1763-rm001_-en-p.pdf

Page 26 tells us to use Input Words 4 (I:0.4) and 5 (I:0.5) for Analog Inputs 0 and 1 respectively. Also, pay attention to the Scaling information starting on Page 27.

Stu.....

Mickey Strikes again.:geek:
 
Last edited:
As suggested by Aleric, Manuals are always helpful.

User Manual:

http://literature.rockwellautomation.com/idc/groups/literature/documents/um/1763-um001_-en-p.pdf

Instruction Reference:

http://literature.rockwellautomation.com/idc/groups/literature/documents/rm/1763-rm001_-en-p.pdf

Page 26 tells us to use Input Words 4 (I:0.4) and 5 (I:0.5) for Analog Inputs 0 and 1 respectively. Also, pay attention to the Scaling information starting on Page 27.

Stu.....

Mickey Strikes again.:geek:

Darn, I forgot to post links to the manuals.:geek:
 

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