i need help for my plc

zeeshan999

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Z
Join Date
May 2014
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blackburn
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Describe how a microprocessor, such as might in a PLC converts an analogue input signal into a digital value. In your answer cover the following points.

a) Why is the conversion from analogue into digital required?
b) Describe the principle of the conversion method used.
c) What is the “resolution” of an AtoD converter?
d) How is this related to the word length use by a processor?
 
Me thinks you need to read your books and google for this answer

Me thinks
You
Do
 
a) most modern processors work digital. (very old ones were using analog
b) check for example sigma Delta conversion
another way is use a 555 Voltage to frequency
c) number of bits it can detect. like 8 bits is 255 values.
d) that is a difficult one, with a 8 bit processor you can see 8 bits, however with some smart program higher bit counts are very good possible. you do not need to have 32 bits to get high precision,
with an ARM328 (8 bits i control 24 bits resolution.
 
The answer to item C.
The resolution of the AtoD converter is the same as a New Years Resolution

It resolves that it will do the AtoD converts to the best of its ability.
 
I did forgot to mention:

  • for the not so lazy ones: rewrite in your own words
  • for the very lazy ones: copy , paste and hope your teacher isn't a member of PLCS.net 🤞🏻
 
You Know I hope to be long gone before that..
on a funny/not so funny note.
My long term mate is now in a dementure ward - very sad
he decides he needs a 'P' so he does it on a nurses leg.

In on of his cognitive moments I asked him jokingly and he replied "Well You Get That"
 

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