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kailash
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Join Date: Jul 2010
Posts: 12

programing s7200 AI to mesured value

07/09/2010 11:32 AM

Dears

I need to program S7200u plc ( 224XP) for analog input as below please one can send me the lest of instructions in sequence

1) input 4-20 Ma total 3 AI

2) get the average posative value of all three AI

2) where as 4Ma=0 A

3) and 20Ma= 1500A

4) display correct mesure current value as a memory bite
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Tornado
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#1

Re: programing s7200 AI to mesured value

07/09/2010 5:17 PM

Averaged amps = (((a1+a2+a3)/3)-4)*1500/16, where a1, a2, and a3 are the three 4-20ma currents. If it must be as a memory byte, the choice of units must fit into the range 0-255.

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Mikerho
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#2

Re: programing s7200 AI to mesured value

07/09/2010 6:26 PM

kailash,

Is there some reason you cannot spend some time with the software and do the programming yourself? What you wish to do is a simple procedure.

You didn't even tell us the specific software that you are using. Is it the STEP 7-Micro/WIN package?

Dig into the instructions. Really try to figure it out. Then, when you hit a specific roadblock, come back and we will attempt to help.

Mike

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