PLC Questions

How to assign Initial values to Tags

http://www.plctalk.net/qanda/showthread.php?t=53556
For any defined tag, if it isn't initialized explicitly, it is retentive. All memory tags on the Logix platform are fully retentive, you don't mark them as you do with Siemens.

To set an initial value, if nothing is writing to the tag, just use the tag browser, and set it there. If you want to make sure that it initializes to a certain value, make an initialization routine, and scan it on "XIC S:FS", which is the first scan bit. In the routine, use MOV instructions to set the values you want.

OOP (Object Oriented Programming) and UDT (User Defined Data Types) are greatly appreciated.

plcdev.com/book/export/html/431na
This page has tips and tricks too.
http://www.plcdev.com/book/export/html/431na

Books

https://www.google.com/search?q=learning+rslogix+5000+programming+pdf&sxsrf=ALeKk01eNlor1_aUSIfq5cRirvH3BY1KQQ:1590304248402&ei=-B3KXvWOGOSF4-EPiYeC6Ac&start=10&sa=N&ved=2ahUKEwj16r3--MvpAhXkwjgGHYmDAH0Q8tMDegQIDBAx&biw=1024&bih=450

https://books.google.co.in/books?id=u-B5CgAAQBAJ&pg=PA167&lpg=PA167&dq=rs+logix+5000+tag+initialization&source=bl&ots=jO4qAwoOFk&sig=ACfU3U1TJsfVOAnItupXDmjjNoUXk8fYFA&hl=ja&sa=X&ved=2ahUKEwj9rZi26MvpAhV64jgGHaL1CRkQ6AEwFXoECAkQAQ#v=onepage&q=rs%20logix%205000%20tag%20initialization&f=false

I/O Mapping

Like our man-made tags, AB gives even the IO also as ready-made tags only. If you open the controller tags, you can see all IO tags. You can just create alias tags with IO names and assign them to the IO tags at the time of integration.