Re : 24 bit 2's complement hex string to number

[Hong.Zhang@agresearch.co.]

Hi GerdW

Please see the attched 2011 vi. The example numbers are on the frnot page.

Thanks

Hong

[GerdW]

Hi Hong,

what's the rule to convert your 4-byte numbers to those decimal (?) numbers?

How to go from B100.0000 to "1"? And from C31F.0000 to 57d/39h? How to go from 56FE.3A00 to 26607d/67EFh?

Do you have a manual describing that conversion?

Using the logic in your VI you would need an input like F7F0.F6FE to get 14607d. How does that fit with D0C7.2000 in your example?

[Hong.Zhang@agresearch.co.]

Hi GerdW

The hex number is return value from a 485 device. The dicimal number is diplay on ther software that coming wiht the device. 

I do not have manul for the conversion. 

Thanks

Hong

[GerdW]

Hi Hong,

dare to ask the vendor of that "485 device"?

[crossrulz]

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Hong.Zhang@agresearch.co.nz wrote:

The hex number is return value from a 485 device.

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What is this device?  Do you have a link to a manual that should describe what the data means?  Because none of  your conversions make any sense.