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SCALING IN ANALOG OUTPUT AO 2xU

Created by: KIRAN_DABHI at: 5/26/2014 3:15 PM (18 Replies)

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5/29/2014 8:29 PM	Rate (0)
KIRAN_DABHI Advanced Member Joined: 5/9/2014 Last visit: 12/20/2020 Posts: 60 Rating: (8)	yes sir problrm was bipolar bit.it is used someware else.

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This contribution was helpful to 1 thankful Users dchartier

5/29/2014 8:30 PM
KIRAN_DABHI Advanced Member Joined: 5/9/2014 Last visit: 12/20/2020 Posts: 60 Rating: (8)	yes sir problrm was bipolar bit.i have used word in which this bit contains.now i have find it.it showes proper scaling.thanks for helping.

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5/29/2014 8:35 PM	Rate (0)
KIRAN_DABHI Advanced Member Joined: 5/9/2014 Last visit: 12/20/2020 Posts: 60 Rating: (8)	how to create own algorithms?can you give some details?i am very much interesting for creating own algorithms for scaling and unscaling? pls reply.

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5/29/2014 9:29 PM	Rate (0)
Marcjan Platinum Expert Joined: 4/22/2010 Last visit: 4/14/2021 Posts: 5653 Rating: (682)	Hello, For unscaling read my first post in this thread. But why do you want to write it by yourself ,it is in the build in functions. Regards, Marcjan
	Problem solved? Please let us know! Please no technical questions by PM, use the forum sections for your questions.
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5/30/2014 3:04 AM	Rate (2)
BhaPraJ Silver Member Joined: 1/28/2012 Last visit: 1/5/2021 Posts: 519 Rating: (82)	[quote user="KIRAN_DABHI"]how to create own algorithms?can you give some details?i am very much interesting for creating own algorithms for scaling and unscaling? pls reply. The algorithm is quite easy. It is a linear equation y=mx+c for scaling of unipolar AI. y is final output PV. m=27648/(High Limit - Low Limit). x=AI Count, c=0-m*(Low Limit) For this you may use SCL (Easier for Calculation based lpgic) Reversed logic may apply for AO.
	Regards, BhaPraJ
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5/30/2014 4:19 PM	Rate (0)
PDGANGANI Posts: 165 Rating: (19)	Pranav J. Bhagat KIRAN_DABHI how to create own algorithms?can you give some details?i am very much interesting for creating own algorithms for scaling and unscaling? pls reply. The algorithm is quite easy. It is a linear equation y=mx+c for scaling of unipolar AI. y is final output PV. m=27648/(High Limit - Low Limit). x=AI Count, c=0-m*(Low Limit) For this you may use SCL (Easier for Calculation based lpgic) Reversed logic may apply for AO. hello, I found SCL and STL languages make calculation bit easy than ladder. Kiran You can try above mentioned formula in SCL or STL .. try it...
PDGANGANI Posts: 165 Rating: (19)
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5/30/2014 8:26 PM	Rate (0)
KIRAN_DABHI Advanced Member Joined: 5/9/2014 Last visit: 12/20/2020 Posts: 60 Rating: (8)	THANKS FOR ALGORITHM.I WILL TRY IT. IF WE WANT BIPOLAR INPUT VALUE THEN SAME ALGORITHM IS USED? IF NOT THEN WHAT SHOULD BE IMPLEMENTED IN ALGORITHM FORMULA. KINDLY REPLY. REGARDS, KIRAN DABHI

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5/30/2014 9:19 PM	Rate (0)
SolutionFinder Posts: 559 Rating: (86)	KIRAN_DABHI THANKS FOR ALGORITHM.I WILL TRY IT. IF WE WANT BIPOLAR INPUT VALUE THEN SAME ALGORITHM IS USED? IF NOT THEN WHAT SHOULD BE IMPLEMENTED IN ALGORITHM FORMULA. KINDLY REPLY. REGARDS, KIRAN DABHI It is batter that you should use FC106 scaling output. There u can directly degine polarity input.
SolutionFinder Posts: 559 Rating: (86)
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5/30/2014 11:26 PM	Rate (0)
Ayman Elotaify Platinum Expert Joined: 5/28/2008 Last visit: 4/11/2021 Posts: 4215 Rating: (791)	KIRAN_DABHI THANKS FOR ALGORITHM.I WILL TRY IT. IF WE WANT BIPOLAR INPUT VALUE THEN SAME ALGORITHM IS USED? IF NOT THEN WHAT SHOULD BE IMPLEMENTED IN ALGORITHM FORMULA. KINDLY REPLY. REGARDS, KIRAN DABHI Hello, Did you read the pdf file that I put its link in my previous post? In page 8 of it, you will found an example of FC106 In page 10, you will found a description of the unscaling function. The UNSCALE function takes a real input value (IN) in engineering units scaled between a low and a high limit (LO_LIM and HI_LIM) and converts it to an integer value. The result is written to OUT. The UNSCALE function uses the following equation: OUT = [ ((IN - LO_LIM) / (HI_LIM - LO_LIM)) * (K2 - K1) ] + K1 The constants K1 and K2 are based upon whether the input value is BIPOLAR or UNIPOLAR. • BIPOLAR: The output integer value is assumed to be between -27648 and +27648; therefore, K1 = -27648.0 and K2 = +27648.0 • UNIPOLAR: The output integer value is assumed to be between 0 and 27648; therefore, K1 = 0.0 and K2 = +27648.0 Selection of UNIPOLAR or BIPOLAR is done using the FC106 input "BIPOLAR". Hope this helps.
	Ayman Elotaify
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