Parts Per Min /Rolling Average

[protrac231]

Does anyone have any logic for Allen Bradley for parts per minute, and rolling averages. Im trying to write logic for uptime / downtime / efficiency of a line.

 

[TConnolly]

Search the forum for +running +average and +rolling +average. You'll find quite a few examples that should work for you.

 

[protrac231]

Still looking for any ideas.

 

[AJZ]

See http://www.plctalk.net/qanda/showthread.php?t=15329&highlight=running+average+rolling

 

[TConnolly]

Hundreds of code examples for averaging using many different methods have been written and posted to the forum. Please try searching.

Here are just a couple of the hundreds of examples that are available.

http://www.plctalk.net/qanda/showthread.php?p=260919

http://www.plctalk.net/qanda/showthread.php?t=53812


In addition, search for OEE (overall equipment efficiency), there are also a ton of posts on calculating OEE as well.

 

[mordred]

I've also added to your post on the previous post
http://www.plctalk.net/qanda/showthread.php?t=15329&highlight=running+average+rolling

 

[parky]

A nice simple one is to count parts over 10 seconds, store the data into a 6 word shift register (shifting down each 10 secs)
then reset the count, add the 6 registers & this gives you a 1 min rolling average every 10 secs. this is a good compromise as you refresh every 10 secs so after no parts for 1 min the parts start counting after 10 secs you have say 10 parts, 20 secs 20 parts, 30 secs 30 parts & so on if the parts are one every second then = 60 ppm but losing a part gives 59 ppm