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convert word to dword

Created by: elmucho at: 5/30/2010 4:45 PM (17 Replies)

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5/30/2010 4:45 PM	Rate (0)
elmucho Posts: 20 Rating: (0)	Hello, I have two words that is have to convert to one dword. And how to converta word into 16bools?It is for a sinamics 120. is puts the speed on to words. How ? Thank you.
elmucho Posts: 20 Rating: (0)	Last edited by: elmucho at: 5/30/2010 4:59 PM
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5/30/2010 5:38 PM	Rate (0)
Darius Platinum Member Joined: 9/28/2005 Last visit: 8/22/2023 Posts: 2957 Rating: (242)	Hello, Maybe I don;t understand you correctly, but here is possible situations: 1) you have word for example in MW10 and want to convert it to DWORD and store it to MD12 the you make this: [code]L MW10 ITD T MD12[/code] 2) you have dword value placed in MW10 (high word) and in MW12 (low word) then you just make this: [code]L MD10[/code] I mean if you have DWORD splitted into two WORDS then you don't need to convert, just load whole DWORD. 3) you don't need to split WORD to bits, because you can access every bit using point: [code]A M10.1 // you access bit number 9 in word MW10[/code]
	Best regards, Darius
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5/30/2010 6:44 PM	Rate (0)
elmucho Posts: 20 Rating: (0)	I have got two QW. QW 260 and QW 262. I want those values to be converted in one dword. Thank you.
elmucho Posts: 20 Rating: (0)
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5/30/2010 10:07 PM	Rate (0)
dchartier Grandmaster-Expert Joined: 9/27/2006 Last visit: 9/22/2023 Posts: 12152 Rating: (2624)	elmucho I have got two QW. QW 260 and QW 262. I want those values to be converted in one dword. Thank you. Hello elmucho; What do you want to do with this doubleword of Outputs? A 16-bit word represents a digital value of +/- 31768, but 2 words concatenated (a DWord) represent a value of +/- 2147483648, which is what you will get if you read QD260 (concatenates QW260 and QW 262), Again, a better understanding of exactly what you want to do will be most helpful. Hope this helps, Daniel Chartier

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5/31/2010 8:53 AM	Rate (0)
Saravana kumar Gold Member Joined: 2/6/2009 Last visit: 9/20/2023 Posts: 937 Rating: (117)	Dearelmucho, I thing you don't want to take the value'sdirectlyas QD, because you don't want to lose same data for theconversion. The only way to solve your issue is to convert your two words to a 32 bit value (Real / DINT) and transfer to atemporary location. Add those two temp variable. Finally after the addition move the final result to a Double word location. For Ex: L QW 260 ITD T TEMP_1 //Double Integer L QW 262 ITD T TEMP_2 //Double Interger L TEMP_1 L TEMP_2 +D T TEMP_3 //Double Interger L TEMP_3 T OUTPUT //Double Word If you want to have"Signed int to Real' conversion block, which can convert the even the signed value, I have a block which is already used in my projects.
	_______________________________________________________________ Best Regards T.Saravana Kumar "All for the Best"
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5/31/2010 8:57 AM	Rate (0)
UMENCHO Diamond Member Joined: 3/21/2006 Last visit: 7/12/2023 Posts: 10221 Rating: (1177)	Hello Saravana, Is it possible to attach here this example? Should be useful in future. Best regards, Hristo Mihalev

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5/31/2010 9:21 AM	Rate (0)
yy1 Gold Member Joined: 3/24/2009 Last visit: 6/20/2023 Posts: 535 Rating: (111)	Saravana kumar I thing you don't want to take the value'sdirectlyas QD, because you don't want to lose same data for theconversion. Dear Saravana, if you access the QD directly, you don't have to use the convertion. So I think, that no data will be lost. But as dchartier said, the requirement is not completely clear. Best regards, yy1

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5/31/2010 7:20 PM	Rate (0)
Saravana kumar Gold Member Joined: 2/6/2009 Last visit: 9/20/2023 Posts: 937 Rating: (117)	Dearyy1, The reason why I am telling data lose if we consider as QD is, >In our Siemens PLC's all integer values are Signed values.We cannot get Unsigned Integer. > That means if the input value is unsigned integer (0 to 65536) and in our PLC it is Signed Value (-32767 to 32767). > For Example, if the integer value what we receive is 40000 means, our PLC will show -25536 (65536-40000). > For Example: Input 1 = 30000, and Input 2 = 40000 and we need to add inputs. Without Conversion With Conversion = Input 1 + Input 2 = Input 1 + Input 2 = 30000 + (-25536) = 30000 + 40000 = 4464 = 70000 > I think now you understood the actual requirement for convertion. > These kind of conversion are very useful in communications between other devices such as Sinamics, Drivers Modbus, OPC, and IEC Etc.
	_______________________________________________________________ Best Regards T.Saravana Kumar "All for the Best"
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5/31/2010 7:27 PM	Rate (1)
Saravana kumar Gold Member Joined: 2/6/2009 Last visit: 9/20/2023 Posts: 937 Rating: (117)	DearUMENCHO, The formula to convert "Signed integer to Unsigned Real" what I derived is shown as below, If Value is negative (i.e input =< 0) Output = 65536 - 2s complement of input if Value is positive (i.e input > 0) Output = input *If Value is equal to 32768 Output = 32768 Please revert me back for any clarifications.
	_______________________________________________________________ Best Regards T.Saravana Kumar "All for the Best"
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5/31/2010 7:40 PM	Rate (0)
yy1 Gold Member Joined: 3/24/2009 Last visit: 6/20/2023 Posts: 535 Rating: (111)	Dear Saravana kumar, you are completely right, if there are 2 signed values, which should be added. When I understand the posting of elmucho right, there is a WORD, which is usually handled as unsigned (but I'm not so familiar with Sinamics ). Best regards, yy1

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