"compute" instruction

[ssrmr2]

I am using a slc 500/03. while writing the instructions for the running average, one of the last rungs had a "compute" instruction for dividing. I was using this key here "/" for the divide, which didnt look like the key that was on the download which looks more like a lower case "L." perfectly verticle. and i received an error about bit addressing.

i ended up using the divide instruction instead of the compute. can anyone tell me what is used in the compute instruction for "divide?"

thanks

steve

 

[TConnolly]

'|'
Which is the shifted '\' key.

For single math operations the CPT instruction executes slower. Its advantage is when multiple math operations must be done because it skips the necessity of storing intermediate results.

 

[ssrmr2]

dont know why the key board has it like an extended :

wtf.

thanks

 

[Ron Beaufort]

there IS a reason ...

Greetings Steve,



the reason that you can’t use the same intuitive “/” (forward slash) character like most calculators use for division is that Allen-Bradley addresses use that particular character to reference the address of a “bit” ...



therefore the “|” (pipe) character is used as a substitute ... in some screen/printer/keyboard fonts it looks like two vertical lines (arranged like a colon) ... in others (as in this post) it looks like just one continuous vertical line ...



note that the name “pipe” comes from the good-old days of DOS ... for example: TYPE|MORE meant “TYPE the contents of this file on the screen but PIPE it through the MORE operation so that the contents are displayed page-by-page" ...



(and yes, I’m fully aware that I’m giving away my advanced age) ...

 

[jstolaruk]

note that the name “pipe” comes from the good-old days of DOS ... for example: TYPE|MORE meant “TYPE the contents of this file on the screen but PIPE it through the MORE operation so that the contents are displayed page-by-page" ...

Actually the "pipe" is used extensively in the UNIX shells preceding DOS by quite a few years. Per your example, it feeds the output of a command or process into the input of another command.