Buffer analog signal

Session

Member
S
Join Date
Jun 2011
Location
kelowna
Posts
3
hey all

pretty new to it all just curious i have analog singal coming in (weight), i smooth the signal what is the best way to "store" the value for 20 minutes so that i can use it later for a calculation.

thanks
 
what is the hardware/software you're using?

Session said:
hey all

pretty new to it all just curious i have analog singal coming in (weight), i smooth the signal what is the best way to "store" the value for 20 minutes so that i can use it later for a calculation.

thanks
Click to expand...

some details would be nice.
 
details.....umm not sure what to tell you. my situation is.

i have a substance x for my product that i grind up at point A where i am sampling the wt, the later on in the process line about twenty minutes down the line i need that weight from point A to add more ingredients to substance x.
 
Session said:
details.....umm not sure what to tell you. my situation is.

i have a substance x for my product that i grind up at point A where i am sampling the wt, the later on in the process line about twenty minutes down the line i need that weight from point A to add more ingredients to substance x.
Click to expand...


sorry, my question to you should've been more detailed. what software/hardware are you using? if it's RSLogix5000, I would use arrays to do what you're trying to do. Other software may require a different solution
 
I'm sure a shift register for the numerical value (be it word or double word) can be found in most PLCs. If not, there are ways of creating it using other instructions, but of course that's more complicated.

Kind regards,
 
thanks everyone I am using Step 7 5.4 on a s7-400 processor, i acutally found a function on the siemens website called staked that is doing exaclty what i was looking for.

cheer

Ryan
 

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