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2 x analogue inputs to 1 x analogue output

Created by: JD1 at: 9/24/2007 1:24 PM (3 Replies)

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9/24/2007 1:24 PM	Rate (0)
JD1 Posts: 2 Rating: (0)	Has any one trid to use 2 x 4-20ma inputs 1 being the lead and the other being the variable with a compare and then use the difference togive out a proportional 0-10v analogue output. from the lead input. many thanks
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9/25/2007 3:57 AM	Rate (0)
rosa Posts: 191 Rating: (58)	Hi!! i dont understand.. ¿ you want the output to be the diference betwen inputs ? AI1-AI2=AQ1 ROSA
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9/25/2007 9:21 AM	Rate (0)
JD1 Posts: 2 Rating: (0)	to expand on my problem LoadA (200kw) = analogue input 1 Load B (200kw) = analogue input 2 If load B reduces to say 150kw then I require a analogue output to reduce the the load A the analogue output is required to reduce the KW's from a generator. then if load B increases again then loadA will require to increase. hope this explains my problem Thanks
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9/25/2007 6:28 PM	Rate (0)
rosa Posts: 191 Rating: (58)	Hi!! i think you need the PI function.. in the example i´m using.. I1 as the ON /OFF AI1 as the process value AI2 as the Set point AQ1 as the output to the process.. AQ1 is trying to adjust its value to makeAI1 reaches AI2 ( AI1 is supposed to change when you change AQ1) Hope this is what you are looking for.. ROSA Attachment PI.zip (1086 Downloads)
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