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| 1/28/2008 1:32 PM | |
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Posts: 1 Rating:
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Does any one know how to add 3 analogue values together and supply the resuiltant as an analogue output Help would be much appreciated |
| 1/28/2008 3:58 PM | |
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Posts: 661 Rating:
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Hello JRD, please see the attached file. Another example about "basic arithmetic functions" you can find here: http://www.automation.siemens.com/logo/html_76/products/02Applications/index.html But remeber that the output can only handle 0-10V (internal value 0-1000). Regards Fux Attachmentadding 3 analog values.zip (893 Downloads) |
| 1/29/2008 10:54 PM | |
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Posts: 1690 Rating:
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Hello, of course, the plan and the info from FUX is right. If you want to reduce the units to make an addition of n (for you n= 3) values, then look at the attachment. I have use a little trick to eliminate mostly of the needed amplifier with GAIN = -1. Normaly (and with the solution from FUX) for the addition of n values you need (n - 1) * 3 units, but with my solution you need only [(n - 1) * 2] + 1. AndI have add a test with 2 units to secure the analoge output range from 0 to 1000 of a hardware output AQ1 or AQ2 - this soud be in every case you use a hardware output!! Best regards Betel AttachmentDEMO_analoge_Addition_und_Wertüberwachung_V1.zip (759 Downloads) |
Last edited by: Betel at: 29.01.2008 22:55 |
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