Ab Files And Registers

Need some help on understanding files R6, N7, F8. These are labeled data files which I understand to mean registers? Data file R6 has several columns (EN) (EU) (DN) (EM) (UL) (IN) (FD) (LEN) (POS) . What do these mean? How are they used? Is there any information in the HELP section of RSLogix?

I am working to learn Move and Bit shift procedures and I am stalled a bit.


I am in debt up to my eyeballs....can someone please help me? (actually just with the questions)

I just got thru with that..I had to learn the bit shifts and i learned the move command last week. One thing i have going here is a micrologix 1200 hooked up at my work bench as a simulator. It sure helps when you can download and watch stuff work. Oh ya also the equal comes in real handy with the move command. Using the equal i can change bits when usung the move as a sequencer.
Dave

The O file is the processor output image table.
The I file is the processor input image table.
The S file contains processor status information
B Files are generally used for internal bits, but can be addressed as integers as well.
T files are timer control registers, see timer instructions.
C files are counter control registers, see counter instructions.
R files are control structures for several instructions, including BSL, BSR, FBC, FFL, FFU and similar instructions.
N files are generally used as integer storage, but can be addressed by bit as well.
F files store single precision floating point values
MG files are used for message functions (MSG)
BT files are used for block transfer read and write control (BTR, BTW)
PD files contain data structures for PID instructions.

For an overview, go to "Help", "Contents", pick "File handling", "Data table files", then the "Click Here" next to "For a list of the various data table files available for use with your processor and a description of the file type".

Thats a pretty broad question. For starters I suggest you get the instruction set reference for your PLC. That will help you a lot.

Micrologix 1100,1200, or 1500 PLC instruction set reference:
http://literature.rockwellautomation.com/idc/groups/literature/documents/rm/1762-rm001_-en-p.pdf

SLC500 instruction set reference:
http://literature.rockwellautomation.com/idc/groups/literature/documents/rm/1747-rm001_-en-p.pdf

SLC500 Addressing manual:
http://literature.rockwellautomation.com/idc/groups/literature/documents/rm/5000-rm005_-en-p.pdf

PLC 5 Instruction Set reference:
http://literature.rockwellautomation.com/idc/groups/literature/documents/rm/1785-rm001_-en-p.pdf

PLC 5 Addressing manual:
http://literature.rockwellautomation.com/idc/groups/literature/documents/rm/5000-rm002_-en-p.pdf


AB's literature library can be found at:
http://literature.rockwellautomation.com/idc/groups/public/documents/webassets/browse_category.hcst
or you can navigate there from the main page at AB.com using the publicaions library link at botton of the left panel.

http://literature.rockwellautomation.com/idc/groups/literature/documents/rm/1747-rm001_-en-p.pdf

Chapter #1 in the above manual explains it all

Ian

Thanks gentlemen. I have downloaded the pdf's and will study. Still bit of a problem with smoke coming out of my training station and my ladder logic is five rungs short of overcoming MY caveman logic, but there is hope. Might use my PLC for an auto fire starter in the wood stove.

Have a good weekend and again thanks for the help.

Put a bag over the PLC to catch the smoke. It is never good to let it out. Make sure you get it all back in the PLC or it may quit running

Goatom,

Which AB PLC family (Micrologix, SLC, or PLC5) are you working with?

After you take a look at the manuals you may have more questions, so by all means, come back with those questions.

Have a good weekend.